Update web-platform-tests to revision 68a256f49be380ca4add535ce8ece9de28820e6b

178 files changed, 6070 insertions, 783 deletions

diff --git a/tests/wpt/metadata/2dcontext/imagebitmap/createImageBitmap-drawImage.html.ini b/tests/wpt/metadata/2dcontext/imagebitmap/createImageBitmap-drawImage.html.ini
index 2a478cda6b3..8db1ab505b6 100644
--- a/tests/wpt/metadata/2dcontext/imagebitmap/createImageBitmap-drawImage.html.ini
+++ b/tests/wpt/metadata/2dcontext/imagebitmap/createImageBitmap-drawImage.html.ini
@@ -75,3 +75,108 @@
   [createImageBitmap from a vector SVGImageElement with negative sw/sh, and drawImage on the created ImageBitmap]
     expected: FAIL
 
+  [createImageBitmap from an HTMLCanvasElement scaled down, and drawImage on the created ImageBitmap]
+    expected: FAIL
+
+  [createImageBitmap from an HTMLCanvasElement scaled up, and drawImage on the created ImageBitmap]
+    expected: FAIL
+
+  [createImageBitmap from an HTMLCanvasElement resized, and drawImage on the created ImageBitmap]
+    expected: FAIL
+
+  [createImageBitmap from an HTMLVideoElement scaled down, and drawImage on the created ImageBitmap]
+    expected: FAIL
+
+  [createImageBitmap from an HTMLVideoElement scaled up, and drawImage on the created ImageBitmap]
+    expected: FAIL
+
+  [createImageBitmap from an HTMLVideoElement resized, and drawImage on the created ImageBitmap]
+    expected: FAIL
+
+  [createImageBitmap from an HTMLVideoElement from a data URL, and drawImage on the created ImageBitmap]
+    expected: FAIL
+
+  [createImageBitmap from an HTMLVideoElement from a data URL scaled down, and drawImage on the created ImageBitmap]
+    expected: FAIL
+
+  [createImageBitmap from an HTMLVideoElement from a data URL scaled up, and drawImage on the created ImageBitmap]
+    expected: FAIL
+
+  [createImageBitmap from an HTMLVideoElement from a data URL resized, and drawImage on the created ImageBitmap]
+    expected: FAIL
+
+  [createImageBitmap from an HTMLVideoElement from a data URL with negative sw/sh, and drawImage on the created ImageBitmap]
+    expected: FAIL
+
+  [createImageBitmap from a bitmap HTMLImageElement scaled down, and drawImage on the created ImageBitmap]
+    expected: FAIL
+
+  [createImageBitmap from a bitmap HTMLImageElement scaled up, and drawImage on the created ImageBitmap]
+    expected: FAIL
+
+  [createImageBitmap from a bitmap HTMLImageElement resized, and drawImage on the created ImageBitmap]
+    expected: FAIL
+
+  [createImageBitmap from a vector HTMLImageElement scaled down, and drawImage on the created ImageBitmap]
+    expected: FAIL
+
+  [createImageBitmap from a vector HTMLImageElement scaled up, and drawImage on the created ImageBitmap]
+    expected: FAIL
+
+  [createImageBitmap from a vector HTMLImageElement resized, and drawImage on the created ImageBitmap]
+    expected: FAIL
+
+  [createImageBitmap from a bitmap SVGImageElement scaled down, and drawImage on the created ImageBitmap]
+    expected: FAIL
+
+  [createImageBitmap from a bitmap SVGImageElement scaled up, and drawImage on the created ImageBitmap]
+    expected: FAIL
+
+  [createImageBitmap from a bitmap SVGImageElement resized, and drawImage on the created ImageBitmap]
+    expected: FAIL
+
+  [createImageBitmap from a vector SVGImageElement scaled down, and drawImage on the created ImageBitmap]
+    expected: FAIL
+
+  [createImageBitmap from a vector SVGImageElement scaled up, and drawImage on the created ImageBitmap]
+    expected: FAIL
+
+  [createImageBitmap from a vector SVGImageElement resized, and drawImage on the created ImageBitmap]
+    expected: FAIL
+
+  [createImageBitmap from an OffscreenCanvas scaled down, and drawImage on the created ImageBitmap]
+    expected: FAIL
+
+  [createImageBitmap from an OffscreenCanvas scaled up, and drawImage on the created ImageBitmap]
+    expected: FAIL
+
+  [createImageBitmap from an OffscreenCanvas resized, and drawImage on the created ImageBitmap]
+    expected: FAIL
+
+  [createImageBitmap from an ImageData scaled down, and drawImage on the created ImageBitmap]
+    expected: FAIL
+
+  [createImageBitmap from an ImageData scaled up, and drawImage on the created ImageBitmap]
+    expected: FAIL
+
+  [createImageBitmap from an ImageData resized, and drawImage on the created ImageBitmap]
+    expected: FAIL
+
+  [createImageBitmap from an ImageBitmap scaled down, and drawImage on the created ImageBitmap]
+    expected: FAIL
+
+  [createImageBitmap from an ImageBitmap scaled up, and drawImage on the created ImageBitmap]
+    expected: FAIL
+
+  [createImageBitmap from an ImageBitmap resized, and drawImage on the created ImageBitmap]
+    expected: FAIL
+
+  [createImageBitmap from a Blob scaled down, and drawImage on the created ImageBitmap]
+    expected: FAIL
+
+  [createImageBitmap from a Blob scaled up, and drawImage on the created ImageBitmap]
+    expected: FAIL
+
+  [createImageBitmap from a Blob resized, and drawImage on the created ImageBitmap]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/2dcontext/imagebitmap/createImageBitmap-invalid-args.html.ini b/tests/wpt/metadata/2dcontext/imagebitmap/createImageBitmap-invalid-args.html.ini
index 2595ee23ece..f46fa170146 100644
--- a/tests/wpt/metadata/2dcontext/imagebitmap/createImageBitmap-invalid-args.html.ini
+++ b/tests/wpt/metadata/2dcontext/imagebitmap/createImageBitmap-invalid-args.html.ini
@@ -194,16 +194,16 @@
     expected: FAIL
 
   [createImageBitmap with a a vector HTMLImageElement source and sw set to 0]
-    expected: TIMEOUT
+    expected: FAIL
 
   [createImageBitmap with a a vector HTMLImageElement source and sh set to 0]
-    expected: NOTRUN
+    expected: FAIL
 
   [createImageBitmap with a a vector HTMLImageElement source and oversized (unallocatable) crop region]
-    expected: NOTRUN
+    expected: FAIL
 
   [createImageBitmap with a a bitmap SVGImageElement source and sw set to 0]
-    expected: NOTRUN
+    expected: TIMEOUT
 
   [createImageBitmap with a a bitmap SVGImageElement source and sh set to 0]
     expected: NOTRUN
@@ -238,3 +238,12 @@
   [createImageBitmap with an available but zero width image source.]
     expected: NOTRUN
 
+  [createImageBitmap with a an HTMLVideoElement from a data URL source and sw set to 0]
+    expected: FAIL
+
+  [createImageBitmap with a an HTMLVideoElement from a data URL source and sh set to 0]
+    expected: FAIL
+
+  [createImageBitmap with a an HTMLVideoElement from a data URL source and oversized (unallocatable) crop region]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/2dcontext/imagebitmap/createImageBitmap-origin.sub.html.ini b/tests/wpt/metadata/2dcontext/imagebitmap/createImageBitmap-origin.sub.html.ini
index a3d31b14f8e..3daeb953062 100644
--- a/tests/wpt/metadata/2dcontext/imagebitmap/createImageBitmap-origin.sub.html.ini
+++ b/tests/wpt/metadata/2dcontext/imagebitmap/createImageBitmap-origin.sub.html.ini
@@ -14,3 +14,6 @@
   [unclean ImageBitmap]
     expected: FAIL
 
+  [redirected to cross-origin HTMLVideoElement]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/FileAPI/reading-data-section/filereader_readAsBinaryString.html.ini b/tests/wpt/metadata/FileAPI/reading-data-section/filereader_readAsBinaryString.html.ini
new file mode 100644
index 00000000000..9647064f4d0
--- /dev/null
+++ b/tests/wpt/metadata/FileAPI/reading-data-section/filereader_readAsBinaryString.html.ini
@@ -0,0 +1,4 @@
+[filereader_readAsBinaryString.html]
+  [FileAPI Test: filereader_readAsBinaryString]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/FileAPI/url/url-in-tags-revoke.window.js.ini b/tests/wpt/metadata/FileAPI/url/url-in-tags-revoke.window.js.ini
new file mode 100644
index 00000000000..e363bfabdfc
--- /dev/null
+++ b/tests/wpt/metadata/FileAPI/url/url-in-tags-revoke.window.js.ini
@@ -0,0 +1,8 @@
+[url-in-tags-revoke.window.html]
+  expected: TIMEOUT
+  [Fetching a blob URL immediately before revoking it works in an iframe.]
+    expected: FAIL
+
+  [Fetching a blob URL immediately before revoking it works in <script> tags.]
+    expected: TIMEOUT
+
diff --git a/tests/wpt/metadata/MANIFEST.json b/tests/wpt/metadata/MANIFEST.json
index bd3460282f0..ac47357a908 100644
--- a/tests/wpt/metadata/MANIFEST.json
+++ b/tests/wpt/metadata/MANIFEST.json
@@ -9349,6 +9349,12 @@
      {}
     ]
    ],
+   "css/css-scroll-snap/snap-at-user-scroll-end-manual.html": [
+    [
+     "/css/css-scroll-snap/snap-at-user-scroll-end-manual.html",
+     {}
+    ]
+   ],
    "css/css-speech/Integer.html": [
     [
      "/css/css-speech/Integer.html",
@@ -114731,6 +114737,18 @@
      {}
     ]
    ],
+   "css/css-grid/grid-items/anonymous-grid-item-001.html": [
+    [
+     "/css/css-grid/grid-items/anonymous-grid-item-001.html",
+     [
+      [
+       "/css/css-flexbox/anonymous-flex-item-split-ref.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
    "css/css-grid/grid-items/explicitly-sized-grid-item-as-table.html": [
     [
      "/css/css-grid/grid-items/explicitly-sized-grid-item-as-table.html",
@@ -135807,6 +135825,78 @@
      {}
     ]
    ],
+   "css/css-transforms/individual-transform/individual-transform-1.html": [
+    [
+     "/css/css-transforms/individual-transform/individual-transform-1.html",
+     [
+      [
+       "/css/css-transforms/individual-transform/individual-transform-1-ref.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
+   "css/css-transforms/individual-transform/individual-transform-2a.html": [
+    [
+     "/css/css-transforms/individual-transform/individual-transform-2a.html",
+     [
+      [
+       "/css/css-transforms/individual-transform/individual-transform-2-ref.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
+   "css/css-transforms/individual-transform/individual-transform-2b.html": [
+    [
+     "/css/css-transforms/individual-transform/individual-transform-2b.html",
+     [
+      [
+       "/css/css-transforms/individual-transform/individual-transform-2-ref.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
+   "css/css-transforms/individual-transform/individual-transform-2c.html": [
+    [
+     "/css/css-transforms/individual-transform/individual-transform-2c.html",
+     [
+      [
+       "/css/css-transforms/individual-transform/individual-transform-2-ref.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
+   "css/css-transforms/individual-transform/individual-transform-2d.html": [
+    [
+     "/css/css-transforms/individual-transform/individual-transform-2d.html",
+     [
+      [
+       "/css/css-transforms/individual-transform/individual-transform-2-ref.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
+   "css/css-transforms/individual-transform/individual-transform-2e.html": [
+    [
+     "/css/css-transforms/individual-transform/individual-transform-2e.html",
+     [
+      [
+       "/css/css-transforms/individual-transform/individual-transform-2-ref.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
    "css/css-transforms/inline-styles/svg-inline-styles-001.html": [
     [
      "/css/css-transforms/inline-styles/svg-inline-styles-001.html",
@@ -142855,6 +142945,18 @@
      {}
     ]
    ],
+   "css/css-transforms/transform-transformed-tr-percent-height-child.html": [
+    [
+     "/css/css-transforms/transform-transformed-tr-percent-height-child.html",
+     [
+      [
+       "/css/css-transforms/transform-transformed-tr-percent-height-child-ref.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
    "css/css-transforms/transform-translate-001.html": [
     [
      "/css/css-transforms/transform-translate-001.html",
@@ -167931,6 +168033,18 @@
      {}
     ]
    ],
+   "css/vendor-imports/mozilla/mozilla-central-reftests/multicol3/broken-column-rule-1.html": [
+    [
+     "/css/vendor-imports/mozilla/mozilla-central-reftests/multicol3/broken-column-rule-1.html",
+     [
+      [
+       "/css/vendor-imports/mozilla/mozilla-central-reftests/multicol3/broken-column-rule-1-ref.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
    "css/vendor-imports/mozilla/mozilla-central-reftests/multicol3/multicol-height-002.xht": [
     [
      "/css/vendor-imports/mozilla/mozilla-central-reftests/multicol3/multicol-height-002.xht",
@@ -171651,6 +171765,78 @@
      {}
     ]
    ],
+   "css/vendor-imports/mozilla/mozilla-central-reftests/transforms/individual-transform-1.html": [
+    [
+     "/css/vendor-imports/mozilla/mozilla-central-reftests/transforms/individual-transform-1.html",
+     [
+      [
+       "/css/vendor-imports/mozilla/mozilla-central-reftests/transforms/individual-transform-1-ref.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
+   "css/vendor-imports/mozilla/mozilla-central-reftests/transforms/individual-transform-2a.html": [
+    [
+     "/css/vendor-imports/mozilla/mozilla-central-reftests/transforms/individual-transform-2a.html",
+     [
+      [
+       "/css/vendor-imports/mozilla/mozilla-central-reftests/transforms/individual-transform-2-ref.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
+   "css/vendor-imports/mozilla/mozilla-central-reftests/transforms/individual-transform-2b.html": [
+    [
+     "/css/vendor-imports/mozilla/mozilla-central-reftests/transforms/individual-transform-2b.html",
+     [
+      [
+       "/css/vendor-imports/mozilla/mozilla-central-reftests/transforms/individual-transform-2-ref.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
+   "css/vendor-imports/mozilla/mozilla-central-reftests/transforms/individual-transform-2c.html": [
+    [
+     "/css/vendor-imports/mozilla/mozilla-central-reftests/transforms/individual-transform-2c.html",
+     [
+      [
+       "/css/vendor-imports/mozilla/mozilla-central-reftests/transforms/individual-transform-2-ref.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
+   "css/vendor-imports/mozilla/mozilla-central-reftests/transforms/individual-transform-2d.html": [
+    [
+     "/css/vendor-imports/mozilla/mozilla-central-reftests/transforms/individual-transform-2d.html",
+     [
+      [
+       "/css/vendor-imports/mozilla/mozilla-central-reftests/transforms/individual-transform-2-ref.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
+   "css/vendor-imports/mozilla/mozilla-central-reftests/transforms/individual-transform-2e.html": [
+    [
+     "/css/vendor-imports/mozilla/mozilla-central-reftests/transforms/individual-transform-2e.html",
+     [
+      [
+       "/css/vendor-imports/mozilla/mozilla-central-reftests/transforms/individual-transform-2-ref.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
    "css/vendor-imports/mozilla/mozilla-central-reftests/transforms/perspective-containing-block-dynamic-1a.html": [
     [
      "/css/vendor-imports/mozilla/mozilla-central-reftests/transforms/perspective-containing-block-dynamic-1a.html",
@@ -178923,6 +179109,18 @@
      {}
     ]
    ],
+   "svg/path/distance/pathLength-positive-percentage.svg": [
+    [
+     "/svg/path/distance/pathLength-positive-percentage.svg",
+     [
+      [
+       "/svg/path/distance/pathLength-positive-ref.svg",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
    "svg/path/distance/pathLength-positive.svg": [
     [
      "/svg/path/distance/pathLength-positive.svg",
@@ -178935,6 +179133,18 @@
      {}
     ]
    ],
+   "svg/path/distance/pathLength-zero-percentage.svg": [
+    [
+     "/svg/path/distance/pathLength-zero-percentage.svg",
+     [
+      [
+       "/svg/path/distance/pathLength-zero-percentage-ref.svg",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
    "svg/path/distance/pathLength-zero.svg": [
     [
      "/svg/path/distance/pathLength-zero.svg",
@@ -210375,6 +210585,16 @@
      {}
     ]
    ],
+   "content-security-policy/form-action/support/post-message-to-opener.sub.html": [
+    [
+     {}
+    ]
+   ],
+   "content-security-policy/form-action/support/post-message-to-parent.sub.html": [
+    [
+     {}
+    ]
+   ],
    "content-security-policy/frame-ancestors/support/frame-ancestors-and-x-frame-options.sub.html": [
     [
      {}
@@ -211010,6 +211230,11 @@
      {}
     ]
    ],
+   "content-security-policy/support/dedicated-worker-helper.js": [
+    [
+     {}
+    ]
+   ],
    "content-security-policy/support/document-write-alert-fail.js": [
     [
      {}
@@ -211140,6 +211365,16 @@
      {}
     ]
    ],
+   "content-security-policy/support/service-worker-helper.js": [
+    [
+     {}
+    ]
+   ],
+   "content-security-policy/support/shared-worker-helper.js": [
+    [
+     {}
+    ]
+   ],
    "content-security-policy/support/siblingPath.js": [
     [
      {}
@@ -252505,6 +252740,16 @@
      {}
     ]
    ],
+   "css/css-transforms/individual-transform/individual-transform-1-ref.html": [
+    [
+     {}
+    ]
+   ],
+   "css/css-transforms/individual-transform/individual-transform-2-ref.html": [
+    [
+     {}
+    ]
+   ],
    "css/css-transforms/inline-styles/reference/svg-inline-styles-ref.html": [
     [
      {}
@@ -253625,6 +253870,11 @@
      {}
     ]
    ],
+   "css/css-transforms/transform-transformed-tr-percent-height-child-ref.html": [
+    [
+     {}
+    ]
+   ],
    "css/css-transforms/transform-translate-ref.html": [
     [
      {}
@@ -264395,6 +264645,11 @@
      {}
     ]
    ],
+   "css/vendor-imports/mozilla/mozilla-central-reftests/multicol3/broken-column-rule-1-ref.html": [
+    [
+     {}
+    ]
+   ],
    "css/vendor-imports/mozilla/mozilla-central-reftests/multicol3/moz-multicol3-column-balancing-break-inside-avoid-1-ref.html": [
     [
      {}
@@ -265540,6 +265795,16 @@
      {}
     ]
    ],
+   "css/vendor-imports/mozilla/mozilla-central-reftests/transforms/individual-transform-1-ref.html": [
+    [
+     {}
+    ]
+   ],
+   "css/vendor-imports/mozilla/mozilla-central-reftests/transforms/individual-transform-2-ref.html": [
+    [
+     {}
+    ]
+   ],
    "css/vendor-imports/mozilla/mozilla-central-reftests/transforms/perspective-zero-2-ref.html": [
     [
      {}
@@ -279200,6 +279465,11 @@
      {}
     ]
    ],
+   "html/semantics/forms/the-input-element/resources/image-submit-click.html": [
+    [
+     {}
+    ]
+   ],
    "html/semantics/forms/the-label-element/.gitkeep": [
     [
      {}
@@ -281810,6 +282080,11 @@
      {}
     ]
    ],
+   "interfaces/css-typed-om.idl": [
+    [
+     {}
+    ]
+   ],
    "interfaces/cssom-view.idl": [
     [
      {}
@@ -283665,6 +283940,11 @@
      {}
     ]
    ],
+   "picture-in-picture/resources/picture-in-picture-helpers.js": [
+    [
+     {}
+    ]
+   ],
    "pointerevents/OWNERS": [
     [
      {}
@@ -288410,6 +288690,11 @@
      {}
     ]
    ],
+   "service-workers/service-worker/resources/fetch-event-network-fallback-worker.js": [
+    [
+     {}
+    ]
+   ],
    "service-workers/service-worker/resources/fetch-event-respond-with-argument-iframe.html": [
     [
      {}
@@ -288420,6 +288705,11 @@
      {}
     ]
    ],
+   "service-workers/service-worker/resources/fetch-event-respond-with-body-loaded-in-chunk-worker.js": [
+    [
+     {}
+    ]
+   ],
    "service-workers/service-worker/resources/fetch-event-respond-with-custom-response-worker.js": [
     [
      {}
@@ -288430,6 +288720,11 @@
      {}
     ]
    ],
+   "service-workers/service-worker/resources/fetch-event-respond-with-readable-stream-chunk-worker.js": [
+    [
+     {}
+    ]
+   ],
    "service-workers/service-worker/resources/fetch-event-respond-with-readable-stream-worker.js": [
     [
      {}
@@ -288945,6 +289240,16 @@
      {}
     ]
    ],
+   "service-workers/service-worker/resources/range-request-to-different-origins-worker.js": [
+    [
+     {}
+    ]
+   ],
+   "service-workers/service-worker/resources/range-request-with-different-cors-modes-worker.js": [
+    [
+     {}
+    ]
+   ],
    "service-workers/service-worker/resources/redirect-worker.js": [
     [
      {}
@@ -290115,6 +290420,11 @@
      {}
     ]
    ],
+   "svg/path/distance/pathLength-zero-percentage-ref.svg": [
+    [
+     {}
+    ]
+   ],
    "svg/path/distance/pathLength-zero-ref.svg": [
     [
      {}
@@ -290955,6 +291265,11 @@
      {}
     ]
    ],
+   "webaudio/resources/stereopanner-testing.js": [
+    [
+     {}
+    ]
+   ],
    "webaudio/the-audio-api/the-analysernode-interface/.gitkeep": [
     [
      {}
@@ -299788,6 +300103,12 @@
      {}
     ]
    ],
+   "FileAPI/reading-data-section/filereader_readAsBinaryString.html": [
+    [
+     "/FileAPI/reading-data-section/filereader_readAsBinaryString.html",
+     {}
+    ]
+   ],
    "FileAPI/reading-data-section/filereader_readAsDataURL.html": [
     [
      "/FileAPI/reading-data-section/filereader_readAsDataURL.html",
@@ -299852,6 +300173,12 @@
      {}
     ]
    ],
+   "FileAPI/url/url-in-tags-revoke.window.js": [
+    [
+     "/FileAPI/url/url-in-tags-revoke.window.html",
+     {}
+    ]
+   ],
    "FileAPI/url/url-in-tags.window.js": [
     [
      "/FileAPI/url/url-in-tags.window.html",
@@ -304634,6 +304961,18 @@
      {}
     ]
    ],
+   "content-security-policy/form-action/form-action-src-allowed-target-blank.sub.html": [
+    [
+     "/content-security-policy/form-action/form-action-src-allowed-target-blank.sub.html",
+     {}
+    ]
+   ],
+   "content-security-policy/form-action/form-action-src-allowed-target-frame.sub.html": [
+    [
+     "/content-security-policy/form-action/form-action-src-allowed-target-frame.sub.html",
+     {}
+    ]
+   ],
    "content-security-policy/form-action/form-action-src-allowed.sub.html": [
     [
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   ],
   "webrtc/identity-helper.js": [
@@ -593890,7 +594761,7 @@
    "testharness"
   ],
   "webvtt/api/VTTRegion/constructor.html": [
-   "c002fac0ad6077fe44987393159f7d86c1226e84",
+   "501828089ebb3d3521045c392230379668529f42",
    "testharness"
   ],
   "webvtt/api/VTTRegion/id.html": [
@@ -593898,7 +594769,7 @@
    "testharness"
   ],
   "webvtt/api/VTTRegion/lines.html": [
-   "590cec0b814df0bca2760cde94b2f74b4c9defca",
+   "ac35f25e77c0430b4776435c07f908f990de1fb0",
    "testharness"
   ],
   "webvtt/api/VTTRegion/non-visible-cue-with-region.html": [
diff --git a/tests/wpt/metadata/css/css-fonts/font-feature-settings-serialization-001.html.ini b/tests/wpt/metadata/css/css-fonts/font-feature-settings-serialization-001.html.ini
index 3efcba59161..c35d38b9e91 100644
--- a/tests/wpt/metadata/css/css-fonts/font-feature-settings-serialization-001.html.ini
+++ b/tests/wpt/metadata/css/css-fonts/font-feature-settings-serialization-001.html.ini
@@ -2,3 +2,6 @@
   [font-feature-settings should have its feature tag serialized with double quotes]
     expected: FAIL
 
+  [font-feature-settings should be serialized with double quotes, and the default value of 1 should be omitted]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/css/css-transforms/individual-transform/individual-transform-1.html.ini b/tests/wpt/metadata/css/css-transforms/individual-transform/individual-transform-1.html.ini
new file mode 100644
index 00000000000..f10a8cf7451
--- /dev/null
+++ b/tests/wpt/metadata/css/css-transforms/individual-transform/individual-transform-1.html.ini
@@ -0,0 +1,2 @@
+[individual-transform-1.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/css/css-transforms/individual-transform/individual-transform-2a.html.ini b/tests/wpt/metadata/css/css-transforms/individual-transform/individual-transform-2a.html.ini
new file mode 100644
index 00000000000..7d934b36ae2
--- /dev/null
+++ b/tests/wpt/metadata/css/css-transforms/individual-transform/individual-transform-2a.html.ini
@@ -0,0 +1,2 @@
+[individual-transform-2a.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/css/css-transforms/individual-transform/individual-transform-2b.html.ini b/tests/wpt/metadata/css/css-transforms/individual-transform/individual-transform-2b.html.ini
new file mode 100644
index 00000000000..bf8df442cb5
--- /dev/null
+++ b/tests/wpt/metadata/css/css-transforms/individual-transform/individual-transform-2b.html.ini
@@ -0,0 +1,2 @@
+[individual-transform-2b.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/css/css-transforms/individual-transform/individual-transform-2c.html.ini b/tests/wpt/metadata/css/css-transforms/individual-transform/individual-transform-2c.html.ini
new file mode 100644
index 00000000000..fb9e5d4d3a9
--- /dev/null
+++ b/tests/wpt/metadata/css/css-transforms/individual-transform/individual-transform-2c.html.ini
@@ -0,0 +1,2 @@
+[individual-transform-2c.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/css/css-transforms/individual-transform/individual-transform-2d.html.ini b/tests/wpt/metadata/css/css-transforms/individual-transform/individual-transform-2d.html.ini
new file mode 100644
index 00000000000..414a8fd4963
--- /dev/null
+++ b/tests/wpt/metadata/css/css-transforms/individual-transform/individual-transform-2d.html.ini
@@ -0,0 +1,2 @@
+[individual-transform-2d.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/css/css-transforms/individual-transform/individual-transform-2e.html.ini b/tests/wpt/metadata/css/css-transforms/individual-transform/individual-transform-2e.html.ini
new file mode 100644
index 00000000000..b20094b7cc1
--- /dev/null
+++ b/tests/wpt/metadata/css/css-transforms/individual-transform/individual-transform-2e.html.ini
@@ -0,0 +1,2 @@
+[individual-transform-2e.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/css/css-transforms/transform-transformed-tr-percent-height-child.html.ini b/tests/wpt/metadata/css/css-transforms/transform-transformed-tr-percent-height-child.html.ini
new file mode 100644
index 00000000000..e26a0479b33
--- /dev/null
+++ b/tests/wpt/metadata/css/css-transforms/transform-transformed-tr-percent-height-child.html.ini
@@ -0,0 +1,2 @@
+[transform-transformed-tr-percent-height-child.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/css/css-values/vh_not_refreshing_on_chrome.html.ini b/tests/wpt/metadata/css/css-values/vh_not_refreshing_on_chrome.html.ini
deleted file mode 100644
index 26435e28b09..00000000000
--- a/tests/wpt/metadata/css/css-values/vh_not_refreshing_on_chrome.html.ini
+++ /dev/null
@@ -1,2 +0,0 @@
-[vh_not_refreshing_on_chrome.html]
-  expected: FAIL
diff --git a/tests/wpt/metadata/css/selectors/invalidation/matches.html.ini b/tests/wpt/metadata/css/selectors/invalidation/matches.html.ini
index 197e801c83b..73b8f36c9b9 100644
--- a/tests/wpt/metadata/css/selectors/invalidation/matches.html.ini
+++ b/tests/wpt/metadata/css/selectors/invalidation/matches.html.ini
@@ -8,3 +8,12 @@
   [Invalidate :matches() for compound selector arguments.]
     expected: FAIL
 
+  [Invalidate :matches() for complex selector arguments.]
+    expected: FAIL
+
+  [Invalidate nested :matches().]
+    expected: FAIL
+
+  [Test specificity of :matches().]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/custom-elements/Document-createElement.html.ini b/tests/wpt/metadata/custom-elements/Document-createElement.html.ini
new file mode 100644
index 00000000000..b3c0d410753
--- /dev/null
+++ b/tests/wpt/metadata/custom-elements/Document-createElement.html.ini
@@ -0,0 +1,4 @@
+[Document-createElement.html]
+  [document.createElement with unknown "is" value should create "undefined" state element]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/html/semantics/forms/the-input-element/image-click-form-data.html.ini b/tests/wpt/metadata/html/semantics/forms/the-input-element/image-click-form-data.html.ini
new file mode 100644
index 00000000000..f2e2235e321
--- /dev/null
+++ b/tests/wpt/metadata/html/semantics/forms/the-input-element/image-click-form-data.html.ini
@@ -0,0 +1,5 @@
+[image-click-form-data.html]
+  expected: TIMEOUT
+  [Image submit button should not add extra form data if 'value' attribute is present with non-empty value]
+    expected: TIMEOUT
+
diff --git a/tests/wpt/web-platform-tests/.travis.yml b/tests/wpt/web-platform-tests/.travis.yml
index 287c6337cbd..7e81ffcfe10 100644
--- a/tests/wpt/web-platform-tests/.travis.yml
+++ b/tests/wpt/web-platform-tests/.travis.yml
@@ -73,7 +73,7 @@ matrix:
       python: "2.7"
       env:
         - secure: "YTSXPwI0DyCA1GhYrLT9KMEV6b7QQKuEeaQgeFDP38OTzJ1+cIj3CC4SRNqbnJ/6SJwPGcdqSxLuV8m4e5HFFnyCcQnJe6h8EMsTehZ7W3j/fP9UYrJqYqvGpe3Vj3xblO5pwBYmq7sg3jAmmuCgAgOW6VGf7cRMucrsmFeo7VM="
-        - JOB=stability SCRIPT=tools/ci/ci_stability.sh PRODUCT=sauce:MicrosoftEdge:14.14393 PLATFORM='Windows 10'
+        - JOB=stability SCRIPT=tools/ci/ci_stability.sh PRODUCT=sauce:MicrosoftEdge:16.16299 PLATFORM='Windows 10'
     - python: 2.7
       env: JOB=tools_unittest TOXENV=py27 HYPOTHESIS_PROFILE=ci SCRIPT=tools/ci/ci_tools_unittest.sh
     - python: 3.6
@@ -97,7 +97,7 @@ matrix:
         - JOB=stability SCRIPT=tools/ci/ci_stability.sh PRODUCT=chrome:dev
     - env:
         - secure: "YTSXPwI0DyCA1GhYrLT9KMEV6b7QQKuEeaQgeFDP38OTzJ1+cIj3CC4SRNqbnJ/6SJwPGcdqSxLuV8m4e5HFFnyCcQnJe6h8EMsTehZ7W3j/fP9UYrJqYqvGpe3Vj3xblO5pwBYmq7sg3jAmmuCgAgOW6VGf7cRMucrsmFeo7VM="
-        - JOB=stability SCRIPT=tools/ci/ci_stability.sh PRODUCT=sauce:MicrosoftEdge:14.14393 PLATFORM='Windows 10'
+        - JOB=stability SCRIPT=tools/ci/ci_stability.sh PRODUCT=sauce:MicrosoftEdge:16.16299 PLATFORM='Windows 10'
     - env:
         - secure: "YTSXPwI0DyCA1GhYrLT9KMEV6b7QQKuEeaQgeFDP38OTzJ1+cIj3CC4SRNqbnJ/6SJwPGcdqSxLuV8m4e5HFFnyCcQnJe6h8EMsTehZ7W3j/fP9UYrJqYqvGpe3Vj3xblO5pwBYmq7sg3jAmmuCgAgOW6VGf7cRMucrsmFeo7VM="
         - JOB=stability SCRIPT=tools/ci/ci_stability.sh PRODUCT=sauce:safari:11.0 PLATFORM='macOS 10.12'
diff --git a/tests/wpt/web-platform-tests/2dcontext/building-paths/canvas_complexshapes_arcto_001-ref.htm b/tests/wpt/web-platform-tests/2dcontext/building-paths/canvas_complexshapes_arcto_001-ref.htm
index 5a1ea381aaf..6fc212ea482 100644
--- a/tests/wpt/web-platform-tests/2dcontext/building-paths/canvas_complexshapes_arcto_001-ref.htm
+++ b/tests/wpt/web-platform-tests/2dcontext/building-paths/canvas_complexshapes_arcto_001-ref.htm
@@ -4,7 +4,6 @@
         <title>HTML5 Canvas Test:  arcTo() adds to subpath if same point</title>
         <link rel="author" title="Microsoft" href="http://www.microsoft.com" />
     </head>
-    lol
     <body>
         <p>Description: If x1,y1 and x2,y2 are the same point, then arcTo must add x1,y1 to the subpath, and connect that point to x0,y0 with a straight line.</p>
         <div><img src="/images/canvas-line.png" alt="line" /></div>
diff --git a/tests/wpt/web-platform-tests/2dcontext/imagebitmap/common.sub.js b/tests/wpt/web-platform-tests/2dcontext/imagebitmap/common.sub.js
index d76a42d5a1f..d4d84193919 100644
--- a/tests/wpt/web-platform-tests/2dcontext/imagebitmap/common.sub.js
+++ b/tests/wpt/web-platform-tests/2dcontext/imagebitmap/common.sub.js
@@ -43,13 +43,34 @@ function makeVideo() {
     });
 }
 
+function makeDataUrlVideo() {
+    const toDataUrl = (type, buffer) => {
+        const encoded = btoa(String.fromCodePoint(...new Uint8Array(buffer)));
+        return `data:${type};base64,${encoded}`
+    };
+
+    return fetch(getVideoURI("/images/pattern"))
+        .then(response => Promise.all([response.headers.get("Content-Type"), response.arrayBuffer()]))
+        .then(([type, data]) => {
+            return new Promise(function(resolve, reject) {
+                var video = document.createElement("video");
+                video.oncanplaythrough = function() {
+                    resolve(video);
+                };
+                video.onerror = reject;
+                video.src = toDataUrl(type, data);
+            });
+        });
+}
+
 function makeMakeHTMLImage(src) {
     return function() {
-        return new Promise(resolve => {
+        return new Promise((resolve, reject) => {
             var img = new Image();
             img.onload = function() {
                 resolve(img);
             };
+            img.onerror = reject;
             img.src = src;
         });
     }
@@ -115,6 +136,7 @@ function makeBlob() {
 var imageSourceTypes = [
     { name: 'an HTMLCanvasElement', factory: makeCanvas },
     { name: 'an HTMLVideoElement',  factory: makeVideo },
+    { name: 'an HTMLVideoElement from a data URL', factory: makeDataUrlVideo },
     { name: 'a bitmap HTMLImageElement', factory: makeMakeHTMLImage("/images/pattern.png") },
     { name: 'a vector HTMLImageElement', factory: makeMakeHTMLImage("/images/pattern.svg") },
     { name: 'a bitmap SVGImageElement', factory: makeMakeSVGImage("/images/pattern.png") },
diff --git a/tests/wpt/web-platform-tests/2dcontext/imagebitmap/createImageBitmap-drawImage.html b/tests/wpt/web-platform-tests/2dcontext/imagebitmap/createImageBitmap-drawImage.html
index 4fe8a83d87e..9146a3704ba 100644
--- a/tests/wpt/web-platform-tests/2dcontext/imagebitmap/createImageBitmap-drawImage.html
+++ b/tests/wpt/web-platform-tests/2dcontext/imagebitmap/createImageBitmap-drawImage.html
@@ -10,25 +10,28 @@
 <link rel="stylesheet" href="/common/canvas-tests.css">
 <body>
 <script>
-function testCanvasDisplayingPattern(canvas)
+function testCanvasDisplayingPattern(canvas, width, height)
 {
-    var tolerance = 5; // for creating ImageBitmap from a video, the tolerance needs to be high
-    _assertPixelApprox(canvas, 5,5, 255,0,0,255, "5,5", "255,0,0,255", tolerance);
-    _assertPixelApprox(canvas, 15,5, 0,255,0,255, "15,5", "0,255,0,255", tolerance);
-    _assertPixelApprox(canvas, 5,15, 0,0,255,255, "5,15", "0,0,255,255", tolerance);
-    _assertPixelApprox(canvas, 15,15, 0,0,0,255, "15,15", "0,0,0,255", tolerance);
+    var tolerance = 10; // for creating ImageBitmap from a video, the tolerance needs to be high
+    const check = (x, y, r, g, b, a) =>
+        _assertPixelApprox(canvas, x,y, r,g,b,a, `${x},${y}`, `${r},${g},${b},${a}`, tolerance);
+    check(1 * width / 4, 1 * height / 4, 255,0,0,255);
+    check(3 * width / 4, 1 * height / 4, 0,255,0,255);
+    check(1 * width / 4, 3 * height / 4, 0,0,255,255);
+    check(3 * width / 4, 3 * height / 4, 0,0,0,255);
 }
 
-function testDrawImageBitmap(source, args = [])
+function testDrawImageBitmap(source, args = [], { resizeWidth = 20, resizeHeight = 20 } = {})
 {
     var canvas = document.createElement("canvas");
-    canvas.width = 20;
-    canvas.height = 20;
+    canvas.width = resizeWidth;
+    canvas.height = resizeHeight;
     var ctx = canvas.getContext("2d");
-    ctx.clearRect(0, 0, canvas.width, canvas.height);
     return createImageBitmap(source, ...args).then(imageBitmap => {
+        assert_equals(imageBitmap.width, resizeWidth);
+        assert_equals(imageBitmap.height, resizeHeight);
         ctx.drawImage(imageBitmap, 0, 0);
-        testCanvasDisplayingPattern(canvas);
+        testCanvasDisplayingPattern(canvas, resizeWidth, resizeHeight);
     });
 }
 
@@ -41,6 +44,27 @@ for (let { name, factory } of imageSourceTypes) {
 
     promise_test(function() {
         return factory().then(function(img) {
+            const options = { resizeWidth: 10, resizeHeight: 10 };
+            return testDrawImageBitmap(img, [options], options);
+        });
+    }, `createImageBitmap from ${name} scaled down, and drawImage on the created ImageBitmap`);
+
+    promise_test(function() {
+        return factory().then(function(img) {
+            const options = { resizeWidth: 40, resizeHeight: 40 };
+            return testDrawImageBitmap(img, [options], options);
+        });
+    }, `createImageBitmap from ${name} scaled up, and drawImage on the created ImageBitmap`);
+
+    promise_test(function() {
+        return factory().then(function(img) {
+            const options = { resizeWidth: 10, resizeHeight: 40 };
+            return testDrawImageBitmap(img, [options], options);
+        });
+    }, `createImageBitmap from ${name} resized, and drawImage on the created ImageBitmap`);
+
+    promise_test(function() {
+        return factory().then(function(img) {
             return testDrawImageBitmap(img, [20, 20, -20, -20]);
         });
     }, `createImageBitmap from ${name} with negative sw/sh, and drawImage on the created ImageBitmap`);
diff --git a/tests/wpt/web-platform-tests/2dcontext/imagebitmap/createImageBitmap-origin.sub.html b/tests/wpt/web-platform-tests/2dcontext/imagebitmap/createImageBitmap-origin.sub.html
index 1b24bca92bd..7f5588eb6d5 100644
--- a/tests/wpt/web-platform-tests/2dcontext/imagebitmap/createImageBitmap-origin.sub.html
+++ b/tests/wpt/web-platform-tests/2dcontext/imagebitmap/createImageBitmap-origin.sub.html
@@ -59,6 +59,18 @@ const arguments = [
   },
 
   {
+    name: "redirected to cross-origin HTMLVideoElement",
+    factory: () => {
+      return new Promise((resolve, reject) => {
+        const video = document.createElement("video");
+        video.oncanplaythrough = () => resolve(video);
+        video.onerror = reject;
+        video.src = "/common/redirect.py?location=" + getVideoURI("http://{{domains[www1]}}:{{ports[http][0]}}/media/movie_300");
+      });
+    },
+  },
+
+  {
     name: "unclean HTMLCanvasElement",
     factory: () => {
       return makeImage().then(image => {
diff --git a/tests/wpt/web-platform-tests/FileAPI/reading-data-section/filereader_readAsBinaryString.html b/tests/wpt/web-platform-tests/FileAPI/reading-data-section/filereader_readAsBinaryString.html
new file mode 100644
index 00000000000..b550e4d0a96
--- /dev/null
+++ b/tests/wpt/web-platform-tests/FileAPI/reading-data-section/filereader_readAsBinaryString.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>FileAPI Test: filereader_readAsBinaryString</title>
+<link rel="author" title="Intel" href="http://www.intel.com">
+<link rel="help" href="https://w3c.github.io/FileAPI/#readAsBinaryString">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script>
+
+async_test(t => {
+  const blob = new Blob(["σ"]);
+  const reader = new FileReader();
+
+  reader.onload = t.step_func_done(() => {
+    assert_equals(typeof reader.result, "string", "The result is string");
+    assert_equals(reader.result.length, 2, "The result length is 2");
+    assert_equals(reader.result, "\xcf\x83", "The result is \xcf\x83");
+    assert_equals(reader.readyState, reader.DONE);
+  });
+
+  reader.onloadstart = t.step_func(() => {
+    assert_equals(reader.readyState, reader.LOADING);
+  });
+
+  reader.onprogress = t.step_func(() => {
+    assert_equals(reader.readyState, reader.LOADING);
+  });
+
+  reader.readAsBinaryString(blob);
+});
+
+</script>
diff --git a/tests/wpt/web-platform-tests/FileAPI/url/url-in-tags-revoke.window.js b/tests/wpt/web-platform-tests/FileAPI/url/url-in-tags-revoke.window.js
new file mode 100644
index 00000000000..e610e0bff28
--- /dev/null
+++ b/tests/wpt/web-platform-tests/FileAPI/url/url-in-tags-revoke.window.js
@@ -0,0 +1,33 @@
+async_test(t => {
+  const run_result = 'test_frame_OK';
+  const blob_contents = '<!doctype html>\n<meta charset="utf-8">\n' +
+    '<script>window.test_result = "' + run_result + '";</script>';
+  const blob = new Blob([blob_contents], {type: 'text/html'});
+  const url = URL.createObjectURL(blob);
+
+  const frame = document.createElement('iframe');
+  frame.setAttribute('src', url);
+  frame.setAttribute('style', 'display:none;');
+  document.body.appendChild(frame);
+  URL.revokeObjectURL(url);
+
+  frame.onload = t.step_func_done(() => {
+    assert_equals(frame.contentWindow.test_result, run_result);
+  });
+}, 'Fetching a blob URL immediately before revoking it works in an iframe.');
+
+async_test(t => {
+  const run_result = 'test_script_OK';
+  const blob_contents = 'window.script_test_result = "' + run_result + '";';
+  const blob = new Blob([blob_contents]);
+  const url = URL.createObjectURL(blob);
+
+  const e = document.createElement('script');
+  e.setAttribute('src', url);
+  e.onload = t.step_func_done(() => {
+    assert_equals(window.script_test_result, run_result);
+  });
+
+  document.body.appendChild(e);
+  URL.revokeObjectURL(url);
+}, 'Fetching a blob URL immediately before revoking it works in <script> tags.');
diff --git a/tests/wpt/web-platform-tests/content-security-policy/form-action/form-action-src-allowed-target-blank.sub.html b/tests/wpt/web-platform-tests/content-security-policy/form-action/form-action-src-allowed-target-blank.sub.html
new file mode 100644
index 00000000000..46747b76885
--- /dev/null
+++ b/tests/wpt/web-platform-tests/content-security-policy/form-action/form-action-src-allowed-target-blank.sub.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <title>form-action-src-redirect-allowed-target-blank</title>
+  <meta http-equiv="Content-Security-Policy" content="form-action 'self'">
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+  <script>
+    function OnDocumentLoaded() {
+      let test = async_test("form submission targetting _blank allowed after a redirect");
+      window.addEventListener("message", function(event) {
+        if (event.data == "DocumentNotBlocked") {
+          event.source.close();
+          test.done();
+        }
+      });
+
+      let form = document.getElementById("form");
+      form.action =
+        "/content-security-policy/form-action/support/post-message-to-opener.sub.html";
+
+      let submit = document.getElementById("submit");
+      submit.click();
+    }
+  </script>
+</head>
+<body onload="OnDocumentLoaded();">
+  <form id="form" method="GET" target="_blank">
+    <input type="hidden" name="message" value="DocumentNotBlocked">
+    <input type="submit" id="submit">
+  </form>
+</body>
+</html>
+
diff --git a/tests/wpt/web-platform-tests/content-security-policy/form-action/form-action-src-allowed-target-frame.sub.html b/tests/wpt/web-platform-tests/content-security-policy/form-action/form-action-src-allowed-target-frame.sub.html
new file mode 100644
index 00000000000..81921d395e3
--- /dev/null
+++ b/tests/wpt/web-platform-tests/content-security-policy/form-action/form-action-src-allowed-target-frame.sub.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <title>form-action-src-allowed-target-frame</title>
+  <meta http-equiv="Content-Security-Policy" content="form-action 'self'">
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+  <script>
+    function OnDocumentLoaded() {
+      let test = async_test("form submission targetting a frame allowed");
+      window.addEventListener("message", function(event) {
+        if (event.data == "DocumentNotBlocked") {
+          test.done();
+        }
+      });
+
+      let form = document.getElementById("form");
+      form.action =
+        "/content-security-policy/form-action/support/post-message-to-parent.sub.html";
+
+      let submit = document.getElementById("submit");
+      submit.click();
+    }
+  </script>
+</head>
+<body onload="OnDocumentLoaded();">
+  <form id="form" method="GET" target="frame">
+    <input type="hidden" name="message" value="DocumentNotBlocked">
+    <input type="submit" id="submit">
+  </form>
+  <iframe name="frame"></iframe>
+</body>
+</html>
+
diff --git a/tests/wpt/web-platform-tests/content-security-policy/form-action/form-action-src-redirect-allowed-target-blank.sub.html b/tests/wpt/web-platform-tests/content-security-policy/form-action/form-action-src-redirect-allowed-target-blank.sub.html
new file mode 100644
index 00000000000..41c68b68f9e
--- /dev/null
+++ b/tests/wpt/web-platform-tests/content-security-policy/form-action/form-action-src-redirect-allowed-target-blank.sub.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <title>form-action-src-redirect-allowed-target-blank</title>
+  <meta http-equiv="Content-Security-Policy" content="form-action 'self'">
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+  <script>
+    function OnDocumentLoaded() {
+      let test = async_test("form submission targetting _blank allowed after a redirect");
+      window.addEventListener("message", function(event) {
+        if (event.data == "DocumentNotBlocked") {
+          event.source.close();
+          test.done();
+        }
+      });
+
+      let form = document.getElementById("form");
+      let final_url = "/content-security-policy/form-action/support/post-message-to-opener.sub.html?message=DocumentNotBlocked";
+      let redirect_url = "/common/redirect.py?location=";
+      form.action = redirect_url + encodeURIComponent(final_url);
+
+      let submit = document.getElementById("submit");
+      submit.click();
+    }
+  </script>
+</head>
+<body onload="OnDocumentLoaded();">
+  <form id="form" method="POST" target="_blank">
+    <input type="submit" id="submit">
+  </form>
+</body>
+</html>
+
diff --git a/tests/wpt/web-platform-tests/content-security-policy/form-action/form-action-src-redirect-allowed-target-frame.sub.html b/tests/wpt/web-platform-tests/content-security-policy/form-action/form-action-src-redirect-allowed-target-frame.sub.html
new file mode 100644
index 00000000000..6afd4459b0f
--- /dev/null
+++ b/tests/wpt/web-platform-tests/content-security-policy/form-action/form-action-src-redirect-allowed-target-frame.sub.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <title>form-action-src-redirect-allowed-target-frame</title>
+  <meta http-equiv="Content-Security-Policy" content="form-action 'self'">
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+  <script>
+    function OnDocumentLoaded() {
+      let test = async_test("form submission targetting a frame allowed after a redirect");
+      window.addEventListener("message", function(event) {
+        if (event.data == "DocumentNotBlocked") {
+          test.done();
+        }
+      });
+
+      let form = document.getElementById("form");
+      let final_url = "/content-security-policy/form-action/support/post-message-to-parent.sub.html?message=DocumentNotBlocked";
+      let redirect_url = "/common/redirect.py?location=";
+      form.action = redirect_url + encodeURIComponent(final_url);
+
+      let submit = document.getElementById("submit");
+      submit.click();
+    }
+  </script>
+</head>
+<body onload="OnDocumentLoaded();">
+  <form id="form" method="POST" target="frame">
+    <input type="submit" id="submit">
+  </form>
+  <iframe name="frame"></iframe>
+</body>
+</html>
+
diff --git a/tests/wpt/web-platform-tests/content-security-policy/form-action/support/post-message-to-opener.sub.html b/tests/wpt/web-platform-tests/content-security-policy/form-action/support/post-message-to-opener.sub.html
new file mode 100644
index 00000000000..0348139057d
--- /dev/null
+++ b/tests/wpt/web-platform-tests/content-security-policy/form-action/support/post-message-to-opener.sub.html
@@ -0,0 +1,3 @@
+<script>
+  opener.postMessage("{{GET[message]}}", "*");
+</script>
diff --git a/tests/wpt/web-platform-tests/content-security-policy/form-action/support/post-message-to-parent.sub.html b/tests/wpt/web-platform-tests/content-security-policy/form-action/support/post-message-to-parent.sub.html
new file mode 100644
index 00000000000..63e464be21a
--- /dev/null
+++ b/tests/wpt/web-platform-tests/content-security-policy/form-action/support/post-message-to-parent.sub.html
@@ -0,0 +1,3 @@
+<script>
+  parent.postMessage("{{GET[message]}}", "*");
+</script>
diff --git a/tests/wpt/web-platform-tests/content-security-policy/reporting/report-multiple-violations-02.html b/tests/wpt/web-platform-tests/content-security-policy/reporting/report-multiple-violations-02.html
index f604e75cb89..d9f7da33388 100644
--- a/tests/wpt/web-platform-tests/content-security-policy/reporting/report-multiple-violations-02.html
+++ b/tests/wpt/web-platform-tests/content-security-policy/reporting/report-multiple-violations-02.html
@@ -12,7 +12,7 @@
 <body>
   <script>
     for (var i = 0; i<5; i++)
-      setTimeout("alert('PASS: setTimeout #" + i + " executed.');", 0);
+      setTimeout("document.body.innerHTML += ('<p>PASS: setTimeout #" + i + " executed.');", 0);
   </script>
   <script async defer src='../support/checkReport.sub.js?reportField=violated-directive&reportValue=script-src%20%27unsafe-inline%27%20%27self%27&reportCount=1'></script>
 </body>
diff --git a/tests/wpt/web-platform-tests/content-security-policy/support/dedicated-worker-helper.js b/tests/wpt/web-platform-tests/content-security-policy/support/dedicated-worker-helper.js
new file mode 100644
index 00000000000..c1ed208e931
--- /dev/null
+++ b/tests/wpt/web-platform-tests/content-security-policy/support/dedicated-worker-helper.js
@@ -0,0 +1,2 @@
+var url = new URL("../support/ping.js", document.baseURI).toString();
+assert_worker_is_loaded(url, document.getElementById("foo").getAttribute("data-desc-fallback"));
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/content-security-policy/support/service-worker-helper.js b/tests/wpt/web-platform-tests/content-security-policy/support/service-worker-helper.js
new file mode 100644
index 00000000000..4e8f8b5f5d2
--- /dev/null
+++ b/tests/wpt/web-platform-tests/content-security-policy/support/service-worker-helper.js
@@ -0,0 +1,2 @@
+var url = new URL("../support/ping.js", document.baseURI).toString();
+assert_service_worker_is_loaded(url, document.getElementById("foo").getAttribute("data-desc-fallback"));
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/content-security-policy/support/shared-worker-helper.js b/tests/wpt/web-platform-tests/content-security-policy/support/shared-worker-helper.js
new file mode 100644
index 00000000000..d0637ec4717
--- /dev/null
+++ b/tests/wpt/web-platform-tests/content-security-policy/support/shared-worker-helper.js
@@ -0,0 +1,2 @@
+var url = new URL("../support/ping.js", document.baseURI).toString();
+assert_shared_worker_is_loaded(url, document.getElementById("foo").getAttribute("data-desc-fallback"));
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/content-security-policy/worker-src/dedicated-worker-src-child-fallback.sub.html b/tests/wpt/web-platform-tests/content-security-policy/worker-src/dedicated-worker-src-child-fallback.sub.html
new file mode 100644
index 00000000000..9c37dfb6301
--- /dev/null
+++ b/tests/wpt/web-platform-tests/content-security-policy/worker-src/dedicated-worker-src-child-fallback.sub.html
@@ -0,0 +1,9 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>Web platform test for dedicated worker allowed by child-src self</title>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script src="../support/testharness-helper.js"></script>
+<!-- Ideally we would use "script-src 'none'" alone but we have to whitelist the actual script that spawns the workers, hence the nonce.-->
+<meta http-equiv="Content-Security-Policy" content="child-src 'self'; script-src 'none' 'nonce-foo'; default-src 'none'; ">
+<script src="../support/dedicated-worker-helper.js" nonce="foo" id="foo" data-desc-fallback="Same-origin dedicated worker allowed by child-src 'self'."></script>
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/content-security-policy/worker-src/dedicated-worker-src-default-fallback.sub.html b/tests/wpt/web-platform-tests/content-security-policy/worker-src/dedicated-worker-src-default-fallback.sub.html
new file mode 100644
index 00000000000..5bded3f59a0
--- /dev/null
+++ b/tests/wpt/web-platform-tests/content-security-policy/worker-src/dedicated-worker-src-default-fallback.sub.html
@@ -0,0 +1,8 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>Web platform test for dedicated worker allowed by default-src self</title>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script src="../support/testharness-helper.js"></script>
+<meta http-equiv="Content-Security-Policy" content="default-src 'self'">
+<script src="../support/dedicated-worker-helper.js" id="foo" data-desc-fallback="Same-origin dedicated worker allowed by default-src 'self'."></script>
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/content-security-policy/worker-src/dedicated-worker-src-script-fallback.sub.html b/tests/wpt/web-platform-tests/content-security-policy/worker-src/dedicated-worker-src-script-fallback.sub.html
new file mode 100644
index 00000000000..ca922076762
--- /dev/null
+++ b/tests/wpt/web-platform-tests/content-security-policy/worker-src/dedicated-worker-src-script-fallback.sub.html
@@ -0,0 +1,8 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>Web platform test for dedicated worker allowed by script-src self</title>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script src="../support/testharness-helper.js"></script>
+<meta http-equiv="Content-Security-Policy" content="script-src 'self'; default-src 'none'; ">
+<script src="../support/dedicated-worker-helper.js" id="foo" data-desc-fallback="Same-origin dedicated worker allowed by script-src 'self'."></script>
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/content-security-policy/worker-src/dedicated-worker-src-self-fallback.sub.html b/tests/wpt/web-platform-tests/content-security-policy/worker-src/dedicated-worker-src-self-fallback.sub.html
new file mode 100644
index 00000000000..06e79db0062
--- /dev/null
+++ b/tests/wpt/web-platform-tests/content-security-policy/worker-src/dedicated-worker-src-self-fallback.sub.html
@@ -0,0 +1,9 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>Web platform test for dedicated worker allowed by worker-src self</title>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script src="../support/testharness-helper.js"></script>
+<!-- Ideally we would use "script-src 'none'" alone but we have to whitelist the actual script that spawns the workers, hence the nonce.-->
+<meta http-equiv="Content-Security-Policy" content="worker-src 'self'; child-src 'none'; script-src 'none' 'nonce-foo'; default-src 'none'; ">
+<script src="../support/dedicated-worker-helper.js" nonce="foo" id="foo" data-desc-fallback="Same-origin dedicated worker allowed by worker-src 'self'."></script>
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/content-security-policy/worker-src/service-worker-src-child-fallback.https.sub.html b/tests/wpt/web-platform-tests/content-security-policy/worker-src/service-worker-src-child-fallback.https.sub.html
new file mode 100644
index 00000000000..0053b1098aa
--- /dev/null
+++ b/tests/wpt/web-platform-tests/content-security-policy/worker-src/service-worker-src-child-fallback.https.sub.html
@@ -0,0 +1,9 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>Web platform test for service worker allowed by child-src self</title>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script src="../support/testharness-helper.js"></script>
+<!-- Ideally we would use "script-src 'none'" alone but we have to whitelist the actual script that spawns the workers, hence the nonce.-->
+<meta http-equiv="Content-Security-Policy" content="child-src 'self'; script-src 'none' 'nonce-foo'; default-src 'none'; ">
+<script src="../support/service-worker-helper.js" nonce="foo" id="foo" data-desc-fallback="Same-origin service worker allowed by child-src 'self'."></script>
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/content-security-policy/worker-src/service-worker-src-default-fallback.https.sub.html b/tests/wpt/web-platform-tests/content-security-policy/worker-src/service-worker-src-default-fallback.https.sub.html
new file mode 100644
index 00000000000..f9df743909f
--- /dev/null
+++ b/tests/wpt/web-platform-tests/content-security-policy/worker-src/service-worker-src-default-fallback.https.sub.html
@@ -0,0 +1,8 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>Web platform test for service worker allowed by default-src self</title>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script src="../support/testharness-helper.js"></script>
+<meta http-equiv="Content-Security-Policy" content="default-src 'self'">
+<script src="../support/service-worker-helper.js" id="foo" data-desc-fallback="Same-origin service worker allowed by default-src 'self'."></script>
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/content-security-policy/worker-src/service-worker-src-script-fallback.https.sub.html b/tests/wpt/web-platform-tests/content-security-policy/worker-src/service-worker-src-script-fallback.https.sub.html
new file mode 100644
index 00000000000..ce03f24f176
--- /dev/null
+++ b/tests/wpt/web-platform-tests/content-security-policy/worker-src/service-worker-src-script-fallback.https.sub.html
@@ -0,0 +1,8 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>Web platform test for service worker allowed by script-src self</title>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script src="../support/testharness-helper.js"></script>
+<meta http-equiv="Content-Security-Policy" content="script-src 'self'; default-src 'none'; ">
+<script src="../support/service-worker-helper.js" id="foo" data-desc-fallback="Same-origin service worker allowed by script-src 'self'."></script>
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/content-security-policy/worker-src/service-worker-src-self-fallback.https.sub.html b/tests/wpt/web-platform-tests/content-security-policy/worker-src/service-worker-src-self-fallback.https.sub.html
new file mode 100644
index 00000000000..58bc8cdb7a7
--- /dev/null
+++ b/tests/wpt/web-platform-tests/content-security-policy/worker-src/service-worker-src-self-fallback.https.sub.html
@@ -0,0 +1,9 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>Web platform test for service worker allowed by worker-src self</title>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script src="../support/testharness-helper.js"></script>
+<!-- Ideally we would use "script-src 'none'" alone but we have to whitelist the actual script that spawns the workers, hence the nonce.-->
+<meta http-equiv="Content-Security-Policy" content="worker-src 'self'; child-src 'none'; script-src 'none' 'nonce-foo'; default-src 'none'; ">
+<script src="../support/service-worker-helper.js" nonce="foo" id="foo" data-desc-fallback="Same-origin service worker allowed by worker-src 'self'."></script>
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/content-security-policy/worker-src/shared-worker-src-child-fallback.sub.html b/tests/wpt/web-platform-tests/content-security-policy/worker-src/shared-worker-src-child-fallback.sub.html
new file mode 100644
index 00000000000..53510852ef0
--- /dev/null
+++ b/tests/wpt/web-platform-tests/content-security-policy/worker-src/shared-worker-src-child-fallback.sub.html
@@ -0,0 +1,9 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>Web platform test for shared worker allowed by child-src self</title>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script src="../support/testharness-helper.js"></script>
+<!-- Ideally we would use "script-src 'none'" alone but we have to whitelist the actual script that spawns the workers, hence the nonce.-->
+<meta http-equiv="Content-Security-Policy" content="child-src 'self'; script-src 'none' 'nonce-foo'; default-src 'none'; ">
+<script src="../support/shared-worker-helper.js" nonce="foo" id="foo" data-desc-fallback="Same-origin shared worker allowed by child-src 'self'."></script>
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/content-security-policy/worker-src/shared-worker-src-default-fallback.sub.html b/tests/wpt/web-platform-tests/content-security-policy/worker-src/shared-worker-src-default-fallback.sub.html
new file mode 100644
index 00000000000..4a07db76aae
--- /dev/null
+++ b/tests/wpt/web-platform-tests/content-security-policy/worker-src/shared-worker-src-default-fallback.sub.html
@@ -0,0 +1,8 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>Web platform test for shared worker allowed by default-src self</title>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script src="../support/testharness-helper.js"></script>
+<meta http-equiv="Content-Security-Policy" content="default-src 'self'">
+<script src="../support/shared-worker-helper.js" id="foo" data-desc-fallback="Same-origin shared worker allowed by default-src 'self'."></script>
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/content-security-policy/worker-src/shared-worker-src-script-fallback.sub.html b/tests/wpt/web-platform-tests/content-security-policy/worker-src/shared-worker-src-script-fallback.sub.html
new file mode 100644
index 00000000000..0a854da3ad2
--- /dev/null
+++ b/tests/wpt/web-platform-tests/content-security-policy/worker-src/shared-worker-src-script-fallback.sub.html
@@ -0,0 +1,8 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>Web platform test for shared worker allowed by script-src self</title>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script src="../support/testharness-helper.js"></script>
+<meta http-equiv="Content-Security-Policy" content="script-src 'self'; default-src 'none'; ">
+<script src="../support/shared-worker-helper.js" id="foo" data-desc-fallback="Same-origin shared worker allowed by script-src 'self'."></script>
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/content-security-policy/worker-src/shared-worker-src-self-fallback.sub.html b/tests/wpt/web-platform-tests/content-security-policy/worker-src/shared-worker-src-self-fallback.sub.html
new file mode 100644
index 00000000000..353a3a0d51b
--- /dev/null
+++ b/tests/wpt/web-platform-tests/content-security-policy/worker-src/shared-worker-src-self-fallback.sub.html
@@ -0,0 +1,9 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>Web platform test for shared worker allowed by worker-src self</title>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script src="../support/testharness-helper.js"></script>
+<!-- Ideally we would use "script-src 'none'" alone but we have to whitelist the actual script that spawns the workers, hence the nonce.-->
+<meta http-equiv="Content-Security-Policy" content="worker-src 'self'; child-src 'none'; script-src 'none' 'nonce-foo'; default-src 'none'; ">
+<script src="../support/shared-worker-helper.js" nonce="foo" id="foo" data-desc-fallback="Same-origin shared worker allowed by worker-src 'self'."></script>
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/css/css-fonts/font-feature-settings-serialization-001.html b/tests/wpt/web-platform-tests/css/css-fonts/font-feature-settings-serialization-001.html
index 025afa2e963..bccc3cf202f 100644
--- a/tests/wpt/web-platform-tests/css/css-fonts/font-feature-settings-serialization-001.html
+++ b/tests/wpt/web-platform-tests/css/css-fonts/font-feature-settings-serialization-001.html
@@ -20,7 +20,7 @@
     const div = document.querySelector("#test");
     const div1 = document.querySelector("#test1");
     test(function() {
-        assert_equals(getComputedStyle(div).fontFeatureSettings, '"vert" 1');
-        assert_equals(getComputedStyle(div1).fontFeatureSettings, '"vert" 1');
-    }, "font-feature-settings should have its feature tag serialized with double quotes");
+        assert_equals(getComputedStyle(div).fontFeatureSettings, '"vert"');
+        assert_equals(getComputedStyle(div1).fontFeatureSettings, '"vert"');
+    }, "font-feature-settings should be serialized with double quotes, and the default value of 1 should be omitted");
 </script>
diff --git a/tests/wpt/web-platform-tests/css/css-grid/alignment/grid-column-axis-alignment-sticky-positioned-items-001.html b/tests/wpt/web-platform-tests/css/css-grid/alignment/grid-column-axis-alignment-sticky-positioned-items-001.html
new file mode 100644
index 00000000000..975360f4c14
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-grid/alignment/grid-column-axis-alignment-sticky-positioned-items-001.html
@@ -0,0 +1,75 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>CSS Grid Layout Test: Self-Alignment along column axis of stcky positioned items</title>
+<link rel="author" title="Javier Fernandez Garcia-Boente" href="mailto:jfernandez@igalia.com">
+<link rel="help" href="https://drafts.csswg.org/css-grid-1/#column-align">
+<link rel="help" href="https://www.w3.org/TR/css-position-3/#sticky-pos">
+<link rel="help" href="https://drafts.csswg.org/css-align-3/#propdef-align-self">
+<link rel="stylesheet" href="../../support/alignment.css">
+<meta name="assert" content="Sticky positioned grid items are aligned correcly.">
+<style>
+.container {
+  border: solid 1px;
+  overflow: auto;
+  height: 500px;
+}
+.grid {
+  position: relative;
+  float: left;
+  display: grid;
+  grid-template-columns: 75px 75px 75px 75px;
+  grid-template-rows: 100px 100px 100px 300px;
+  background: grey;
+  height: 400px;
+  margin-right: 20px;
+}
+.sticky {
+  position: -webkit-sticky;
+  position: sticky;
+  width: 20px;
+  height: 20px;
+  background-color: #cae8ca;
+}
+.item1 {
+  top: 0px;
+  grid-column: 1;
+  grid-row: 1;
+}
+.item2 {
+  top: 0px;
+  grid-column: 2;
+  grid-row: 2;
+}
+.item3 {
+  top: 0px;
+  grid-column: 3;
+  grid-row: 3;
+}
+.item4 {
+  grid-column: 4;
+  grid-row: 4;
+  background: lightgrey;
+}
+.scroll { overflow: auto; }
+</style>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/check-layout-th.js"></script>
+<body onload="checkLayout('.grid')">
+<div class="container">
+    <div style="height:30px"></div>
+    <div class="grid">
+        <div class="item1 sticky alignSelfStart"  data-offset-x="0"   data-offset-y="0"></div>
+        <div class="item2 sticky alignSelfCenter" data-offset-x="75"  data-offset-y="140"></div>
+        <div class="item3 sticky alignSelfEnd"    data-offset-x="150" data-offset-y="280"></div>
+        <div class="item4"></div>
+    </div>
+    <div class="grid scroll">
+        <div class="item1 sticky alignSelfStart"  data-offset-x="0"   data-offset-y="0"></div>
+        <div class="item2 sticky alignSelfCenter" data-offset-x="75"  data-offset-y="140"></div>
+        <div class="item3 sticky alignSelfEnd"    data-offset-x="150" data-offset-y="280"></div>
+        <div class="item4"></div>
+    </div>
+    <div style="height:2000px"></div>
+</div>
+</body>
diff --git a/tests/wpt/web-platform-tests/css/css-grid/alignment/grid-column-axis-alignment-sticky-positioned-items-002.html b/tests/wpt/web-platform-tests/css/css-grid/alignment/grid-column-axis-alignment-sticky-positioned-items-002.html
new file mode 100644
index 00000000000..357cbe13e25
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-grid/alignment/grid-column-axis-alignment-sticky-positioned-items-002.html
@@ -0,0 +1,75 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>CSS Grid Layout Test: Self-Alignment along column axis of stcky positioned items</title>
+<link rel="author" title="Javier Fernandez Garcia-Boente" href="mailto:jfernandez@igalia.com">
+<link rel="help" href="https://drafts.csswg.org/css-grid-1/#column-align">
+<link rel="help" href="https://www.w3.org/TR/css-position-3/#sticky-pos">
+<link rel="help" href="https://drafts.csswg.org/css-align-3/#propdef-align-self">
+<link rel="stylesheet" href="../../support/alignment.css">
+<meta name="assert" content="Sticky positioned grid items are aligned correcly, but preserving non-static positions when required.">
+<style>
+.container {
+  border: solid 1px;
+  overflow: auto;
+  height: 500px;
+}
+.grid {
+  position: relative;
+  float: left;
+  display: grid;
+  grid-template-columns: 75px 75px 75px 75px;
+  grid-template-rows: 100px 100px 100px 300px;
+  background: grey;
+  height: 400px;
+  margin-right: 20px;
+}
+.sticky {
+  position: -webkit-sticky;
+  position: sticky;
+  width: 20px;
+  height: 20px;
+  background-color: #cae8ca;
+}
+.item1 {
+  top: 40px;
+  grid-column: 1;
+  grid-row: 1;
+}
+.item2 {
+  top: 100px;
+  grid-column: 2;
+  grid-row: 2;
+}
+.item3 {
+  top: 290px;
+  grid-column: 3;
+  grid-row: 3;
+}
+.item4 {
+  grid-column: 4;
+  grid-row: 4;
+  background: lightgrey;
+}
+.scroll { overflow: auto; }
+</style>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/check-layout-th.js"></script>
+<body onload="checkLayout('.grid')">
+<div class="container">
+    <div style="height:30px"></div>
+    <div class="grid">
+        <div class="item1 sticky alignSelfStart"  data-offset-x="0"   data-offset-y="10"></div>
+        <div class="item2 sticky alignSelfCenter" data-offset-x="75"  data-offset-y="140"></div>
+        <div class="item3 sticky alignSelfEnd"    data-offset-x="150" data-offset-y="280"></div>
+        <div class="item4"></div>
+    </div>
+    <div class="grid scroll">
+        <div class="item1 sticky alignSelfStart"  data-offset-x="0"   data-offset-y="40"></div>
+        <div class="item2 sticky alignSelfCenter" data-offset-x="75"  data-offset-y="140"></div>
+        <div class="item3 sticky alignSelfEnd"    data-offset-x="150" data-offset-y="290"></div>
+        <div class="item4"></div>
+    </div>
+    <div style="height:2000px"></div>
+</div>
+</body>
diff --git a/tests/wpt/web-platform-tests/css/css-grid/alignment/grid-row-axis-alignment-sticky-positioned-items-001.html b/tests/wpt/web-platform-tests/css/css-grid/alignment/grid-row-axis-alignment-sticky-positioned-items-001.html
new file mode 100644
index 00000000000..31d06b80621
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-grid/alignment/grid-row-axis-alignment-sticky-positioned-items-001.html
@@ -0,0 +1,75 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>CSS Grid Layout Test: Self-Alignment along row axis of stcky positioned items</title>
+<link rel="author" title="Javier Fernandez Garcia-Boente" href="mailto:jfernandez@igalia.com">
+<link rel="help" href="https://drafts.csswg.org/css-grid-1/#row-align">
+<link rel="help" href="https://www.w3.org/TR/css-position-3/#sticky-pos">
+<link rel="help" href="https://drafts.csswg.org/css-align-3/#propdef-justify-self">
+<link rel="stylesheet" href="../../support/alignment.css">
+<meta name="assert" content="Sticky positioned grid items are aligned correcly.">
+<style>
+.container {
+  border: solid 1px;
+  overflow: auto;
+  width: 500px;
+}
+.grid {
+  position: relative;
+  display: grid;
+  grid-template-columns: 100px 100px 100px 300px;
+  grid-template-rows: 75px 75px 75px 75px;
+  background: grey;
+  width: 400px;
+  margin-bottom: 20px;
+}
+.sticky {
+  position: -webkit-sticky;
+  position: sticky;
+  width: 20px;
+  height: 20px;
+  background-color: #cae8ca;
+}
+.item1 {
+  left: 0px;
+  grid-column: 1;
+  grid-row: 1;
+}
+.item2 {
+  left: 0px;
+  grid-column: 2;
+  grid-row: 2;
+}
+.item3 {
+  left: 0px;
+  grid-column: 3;
+  grid-row: 3;
+}
+.item4 {
+  grid-column: 4;
+  grid-row: 4;
+  background: lightgrey;
+}
+.scroll { overflow: auto; }
+</style>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/check-layout-th.js"></script>
+<body onload="checkLayout('.grid')">
+<div class="container">
+    <div style="width: 30px; float:left; height: 10px;"></div>
+    <div class="grid">
+        <div class="item1 sticky justifySelfStart"  data-offset-x="0"   data-offset-y="0"></div>
+        <div class="item2 sticky justifySelfCenter" data-offset-x="140" data-offset-y="75"></div>
+        <div class="item3 sticky justifySelfEnd"    data-offset-x="280" data-offset-y="150"></div>
+        <div class="item4"></div>
+    </div>
+    <div style="width: 30px; float:left; height: 10px;"></div>
+    <div class="grid scroll">
+        <div class="item1 sticky justifySelfStart"  data-offset-x="0"   data-offset-y="0"></div>
+        <div class="item2 sticky justifySelfCenter" data-offset-x="140" data-offset-y="75"></div>
+        <div class="item3 sticky justifySelfEnd"    data-offset-x="280" data-offset-y="150"></div>
+        <div class="item4"></div>
+    </div>
+    <div style="width: 2000px; height: 10px;"></div>
+</div>
+</body>
diff --git a/tests/wpt/web-platform-tests/css/css-grid/alignment/grid-row-axis-alignment-sticky-positioned-items-002.html b/tests/wpt/web-platform-tests/css/css-grid/alignment/grid-row-axis-alignment-sticky-positioned-items-002.html
new file mode 100644
index 00000000000..cf14691161a
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-grid/alignment/grid-row-axis-alignment-sticky-positioned-items-002.html
@@ -0,0 +1,75 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>CSS Grid Layout Test: Self-Alignment along row axis of stcky positioned items</title>
+<link rel="author" title="Javier Fernandez Garcia-Boente" href="mailto:jfernandez@igalia.com">
+<link rel="help" href="https://drafts.csswg.org/css-grid-1/#row-align">
+<link rel="help" href="https://www.w3.org/TR/css-position-3/#sticky-pos">
+<link rel="help" href="https://drafts.csswg.org/css-align-3/#propdef-justify-self">
+<link rel="stylesheet" href="../../support/alignment.css">
+<meta name="assert" content="Sticky positioned grid items are aligned correcly, but preserving non-static positions when required.">
+<style>
+.container {
+  border: solid 1px;
+  overflow: auto;
+  width: 500px;
+}
+.grid {
+  position: relative;
+  display: grid;
+  grid-template-columns: 100px 100px 100px 300px;
+  grid-template-rows: 75px 75px 75px 75px;
+  background: grey;
+  width: 400px;
+  margin-bottom: 20px;
+}
+.sticky {
+  position: -webkit-sticky;
+  position: sticky;
+  width: 20px;
+  height: 20px;
+  background-color: #cae8ca;
+}
+.item1 {
+  left: 40px;
+  grid-column: 1;
+  grid-row: 1;
+}
+.item2 {
+  left: 100px;
+  grid-column: 2;
+  grid-row: 2;
+}
+.item3 {
+  left: 290px;
+  grid-column: 3;
+  grid-row: 3;
+}
+.item4 {
+  grid-column: 4;
+  grid-row: 4;
+  background: lightgrey;
+}
+.scroll { overflow: auto; }
+</style>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/check-layout-th.js"></script>
+<body onload="checkLayout('.grid')">
+<div class="container">
+    <div style="width: 30px; float:left; height: 10px;"></div>
+    <div class="grid">
+        <div class="item1 sticky justifySelfStart"  data-offset-x="10"  data-offset-y="0"></div>
+        <div class="item2 sticky justifySelfCenter" data-offset-x="140" data-offset-y="75"></div>
+        <div class="item3 sticky justifySelfEnd"    data-offset-x="280" data-offset-y="150"></div>
+        <div class="item4"></div>
+    </div>
+    <div style="width: 30px; float:left; height: 10px;"></div>
+    <div class="grid scroll">
+        <div class="item1 sticky justifySelfStart"  data-offset-x="40"  data-offset-y="0"></div>
+        <div class="item2 sticky justifySelfCenter" data-offset-x="140" data-offset-y="75"></div>
+        <div class="item3 sticky justifySelfEnd"    data-offset-x="290" data-offset-y="150"></div>
+        <div class="item4"></div>
+    </div>
+    <div style="width: 2000px; height: 10px;"></div>
+</div>
+</body>
diff --git a/tests/wpt/web-platform-tests/css/css-grid/grid-items/anonymous-grid-item-001.html b/tests/wpt/web-platform-tests/css/css-grid/grid-items/anonymous-grid-item-001.html
new file mode 100644
index 00000000000..db88ce54b38
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-grid/grid-items/anonymous-grid-item-001.html
@@ -0,0 +1,8 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>CSS Grid Test: Anonymous grid items - non-contiguous text runs - position:absolute</title>
+<link rel="author" title="Rune Lillesveen" href="mailto:futhark@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-grid/#grid-items">
+<link rel="match" href="/css/css-flexbox/anonymous-flex-item-split-ref.html">
+<p>The words "Two" and "lines" should not be on the same line.</p>
+<div style="display:grid">Two <span style="position:absolute"></span>lines</div>
diff --git a/tests/wpt/web-platform-tests/css/css-scroll-snap/snap-at-user-scroll-end-manual.html b/tests/wpt/web-platform-tests/css/css-scroll-snap/snap-at-user-scroll-end-manual.html
new file mode 100644
index 00000000000..d1e4be5a20a
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-scroll-snap/snap-at-user-scroll-end-manual.html
@@ -0,0 +1,86 @@
+<!DOCTYPE html>
+<link rel="help" href="https://drafts.csswg.org/css-scroll-snap-1" />
+<title>Tests that window should snap at user scroll end.</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<style>
+body {
+  margin: 0px;
+  overflow: scroll;
+  scroll-snap-type: both mandatory;
+}
+#content {
+  width: 2000px;
+  height: 2000px;
+  padding: 0px;
+  margin: 0px;
+}
+#target {
+  position: relative;
+  left: 400px;
+  top: 400px;
+  width: 400px;
+  height: 400px;
+  background-color: lightblue;
+  scroll-snap-align: start;
+}
+#i1 {
+  color: red;
+  font-weight: bold;
+}
+</style>
+
+<div id="content">
+  <div id="target">
+    <h1>CSSScrollSnap</h1>
+    <h4>Tests that the window can snap at user scroll end.</h4>
+    <ol>
+      <li id="i1" style="color: red">
+        Scroll the page vertically and horizontally.
+        Keep scrolling until background has turned yellow.</li>
+      <li id="i2"> Press the button "Done"</li>
+    </ol>
+    <input type="button" id="btn" value="DONE" style="width: 100px; height: 50px;"/>
+  </div>
+</div>
+
+<script>
+var body = document.body;
+var button = document.getElementById("btn");
+var target = document.getElementById("target");
+var instruction1 = document.getElementById("i1");
+var instruction2 = document.getElementById("i2");
+var scrolled_x = false;
+var scrolled_y = false;
+var start_x = window.scrollX;
+var start_y = window.scrollY;
+
+window.onscroll = function() {
+  if (scrolled_x && scrolled_y) {
+    body.style.backgroundColor = "yellow";
+    instruction1.style.color = "black";
+    instruction1.style.fontWeight = "normal";
+    instruction2.style.color = "red";
+    instruction2.style.fontWeight = "bold";
+    return;
+  }
+
+  scrolled_x |= window.scrollX != start_x;
+  scrolled_y |= window.scrollY != start_y;
+}
+
+button.onclick = function() {
+  if (!scrolled_x || !scrolled_y)
+    return;
+
+  assert_equals(window.scrollX, target.offsetLeft,
+        "window.scrollX should be at snapped position.");
+  assert_equals(window.scrollY, target.offsetTop,
+        "window.scrollY should be at snapped position.");
+  // To make the test result visible.
+  var content = document.getElementById("content");
+  body.removeChild(content);
+  done();
+}
+
+</script>
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/css/css-shapes/parsing/shape-outside-invalid-position.html b/tests/wpt/web-platform-tests/css/css-shapes/parsing/shape-outside-invalid-position.html
new file mode 100644
index 00000000000..4815402949a
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-shapes/parsing/shape-outside-invalid-position.html
@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Shapes Module Level 1: parsing shape-outside with invalid position values</title>
+<link rel="author" title="Eric Willigers" href="mailto:ericwilligers@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-values-4/#typedef-position">
+<meta name="assert" content="shape-outside positions support only the '<position>' grammar.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="resources/parsing-testcommon.js"></script>
+</head>
+<body>
+<script>
+// The following were supported in an earlier version of the spec.
+// https://github.com/w3c/csswg-drafts/issues/2140
+// Deprecated in Blink with support to be removed in M68, around July 2018.
+test_invalid_value("shape-outside", "circle(at center left 1px)");
+test_invalid_value("shape-outside", "circle(at center top 2px)");
+test_invalid_value("shape-outside", "circle(at right 3% center)");
+test_invalid_value("shape-outside", "circle(at left 4px top)");
+test_invalid_value("shape-outside", "circle(at right top 5px)");
+test_invalid_value("shape-outside", "circle(at bottom 6% center)");
+test_invalid_value("shape-outside", "circle(at bottom 7% left)");
+test_invalid_value("shape-outside", "circle(at bottom right 8%)");
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-shapes/parsing/shape-outside-valid-position.html b/tests/wpt/web-platform-tests/css/css-shapes/parsing/shape-outside-valid-position.html
new file mode 100644
index 00000000000..ca01b352b63
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-shapes/parsing/shape-outside-valid-position.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Shapes Module Level 1: parsing shape-outside with valid position values</title>
+<link rel="author" title="Eric Willigers" href="mailto:ericwilligers@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-values-4/#typedef-position">
+<meta name="assert" content="shape-outside positions support the full '<position>' grammar.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="resources/parsing-testcommon.js"></script>
+</head>
+<body>
+<script>
+// First serialization is being returned by Firefox/Edge, second by Blink/WebKit.
+test_valid_value("shape-outside", "circle(at 10%)", ["circle(at 10%)", "circle(at 10% 50%)"]);
+test_valid_value("shape-outside", "circle(at 20% 30px)");
+test_valid_value("shape-outside", "circle(at 30px center)", ["circle(at 30px center)", "circle(at 30px 50%)"]);
+test_valid_value("shape-outside", "circle(at 40px top)", ["circle(at 40px top)", "circle(at 40px 0%)"]);
+test_valid_value("shape-outside", "circle(at bottom 10% right 20%)", ["circle(at bottom 10% right 20%)", "circle(at 80% 90%)"]);
+test_valid_value("shape-outside", "circle(at bottom right)", ["circle(at bottom right)", "circle(at 100% 100%)"]);
+test_valid_value("shape-outside", "circle(at center)", ["circle(at center)", "circle(at 50% 50%)"]);
+test_valid_value("shape-outside", "circle(at center 50px)", ["circle(at center 50px)", "circle(at 50% 50px)"]);
+test_valid_value("shape-outside", "circle(at center bottom)", ["circle(at center bottom)", "circle(at 50% 100%)"]);
+test_valid_value("shape-outside", "circle(at center center)", ["circle(at center center)", "circle(at 50% 50%)"]);
+test_valid_value("shape-outside", "circle(at center left)", ["circle(at center left)", "circle(at 0% 50%)"]);
+test_valid_value("shape-outside", "circle(at left)", ["circle(at left)", "circle(at 0% 50%)"]);
+test_valid_value("shape-outside", "circle(at left bottom)", ["circle(at left bottom)", "circle(at 0% 100%)"]);
+test_valid_value("shape-outside", "circle(at left center)", ["circle(at left center)", "circle(at 0% 50%)"]);
+test_valid_value("shape-outside", "circle(at right 40%)", ["circle(at right 40%)", "circle(at 100% 40%)"]);
+test_valid_value("shape-outside", "circle(at right 30% top 60px)", ["circle(at right 30% top 60px)",  "circle(at 70% 60px)"]);
+test_valid_value("shape-outside", "circle(at top)", ["circle(at top)", "circle(at 50% 0%)"]);
+test_valid_value("shape-outside", "circle(at top center)", ["circle(at top center)", "circle(at 50% 0%)"]);
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-transforms/individual-transform/individual-transform-1-ref.html b/tests/wpt/web-platform-tests/css/css-transforms/individual-transform/individual-transform-1-ref.html
new file mode 100644
index 00000000000..8a568d25d92
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-transforms/individual-transform/individual-transform-1-ref.html
@@ -0,0 +1,90 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8">
+    <title>Individual transform: compare individual transform with transform functions</title>
+    <link rel="author" title="CJ Ku" href="mailto:cku@mozilla.com">
+    <link rel="author" title="Mozilla" href="https://www.mozilla.org">
+    <link rel="help" href="https://drafts.csswg.org/css-transforms-2/#individual-transforms">
+    <meta name="assert" content="Tests whether individaul transform works correctlyi by compare the rendering result with transfrom functions of the 'transform' property."/>
+    <style>
+      div {
+        position: fixed;
+        width: 100px;
+        height: 100px;
+        transform-origin: 0 0;
+        border-style: solid;
+        border-width: 10px 0px 10px 0px;
+        border-color: lime;
+      }
+      .row_1 {
+        top: 100px;
+      }
+      .scale_1{
+        left: 100px;
+        width: 50px;
+        height: 100px;
+        transform: scaleX(2);
+      }
+      .translate_1 {
+        left: 150px;
+        transform: translateX(150px);
+      }
+      .rotate_1 {
+        left: 450px;
+        transform-origin: 50% 50%;
+        transform: rotate(90deg);
+      }
+
+      .row_2 {
+        top: 250px;
+      }
+      .scale_2{
+        left: 100px;
+        width: 50px;
+        height: 50px;
+        transform: scale(2, 2);
+      }
+      .translate_2 {
+        left: 150px;
+        top: 200px;
+        transform: translate(150px, 50px);
+      }
+      .rotate_2 {
+        left: 450px;
+        transform-origin: 50% 50%;
+        transform: rotate3d(0, 0, 1, 90deg);
+      }
+      .row_3 {
+        transform: perspective(500px);
+        top: 400px;
+      }
+      .scale_3{
+        left: 100px;
+        width: 50px;
+        height: 50px;
+        transform: scale3d(2, 2, 2);
+      }
+      .translate_3 {
+        left: 150px;
+        transform: translate3d(150px, 10px, 10px);
+      }
+      .rotate_3 {
+        left: 450px;
+        transform-origin: 50% 50%;
+        transform: rotate3d(0, 1, 0, 45deg);
+      }
+    </style>
+  </head>
+  <body>
+    <div class="scale_1 row_1"></div>
+    <div class="translate_1 row_1"></div>
+    <div class="rotate_1 row_1"></div>
+    <div class="scale_2 row_2"></div>
+    <div class="translate_2 row_2"></div>
+    <div class="rotate_2 row_2"></div>
+    <div class="scale_3 row_3"></div>
+    <div class="translate_3 row_3"></div>
+    <div class="rotate_3 row_3"></div>
+  </body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-transforms/individual-transform/individual-transform-1.html b/tests/wpt/web-platform-tests/css/css-transforms/individual-transform/individual-transform-1.html
new file mode 100644
index 00000000000..4f83e2eac47
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-transforms/individual-transform/individual-transform-1.html
@@ -0,0 +1,100 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8">
+    <title>Individual transform: compare individual transform with transform functions</title>
+    <link rel="author" title="CJ Ku" href="mailto:cku@mozilla.com">
+    <link rel="author" title="Mozilla" href="https://www.mozilla.org">
+    <link rel="help" href="https://drafts.csswg.org/css-transforms-2/#individual-transforms">
+    <meta name="assert" content="Tests whether individaul transform works correctlyi by compare the rendering result with transfrom functions of the 'transform' property."/>
+    <link rel="match" href="individual-transform-1-ref.html">
+    <style>
+      div {
+        position: fixed;
+        width: 100px;
+        height: 100px;
+        transform-origin: 0 0;
+        border-style: solid;
+        border-width: 10px 0px 10px 0px;
+        border-color: lime;
+      }
+      .row_1 {
+        top: 100px;
+      }
+      .scale_1{
+        left: 100px;
+        width: 50px;
+        height: 100px;
+        /* test 'scale: <number>' */
+        scale: 2;
+      }
+      .translate_1 {
+        left: 150px;
+        /* test 'translate: <length-percentage>' */
+        translate: 150px;
+      }
+      .rotate_1 {
+        left: 450px;
+        transform-origin: 50% 50%;
+        /* test 'rota: te<angle>' */
+        rotate: 90deg;
+      }
+
+      .row_2 {
+        top: 250px;
+      }
+      .scale_2{
+        left: 100px;
+        width: 50px;
+        height: 50px;
+        /* test 'scale: <number>{2}'' */
+        scale: 2 2;
+      }
+      .translate_2 {
+        left: 150px;
+        top: 200px;
+        /* test 'translate: <length-percentage><length-percentage>' */
+        translate: 150px 50px;
+      }
+      .rotate_2 {
+        left: 450px;
+        transform-origin: 50% 50%;
+        /* test 'rotate: <number>{3}<angle>'*/
+        rotate: 0 0 1 90deg;
+      }
+      .row_3 {
+        transform: perspective(500px);
+        top: 400px;
+      }
+      .scale_3{
+        left: 100px;
+        width: 50px;
+        height: 50px;
+        /* test 'scale: <number>{3}'' */
+        scale: 2 2 2;
+      }
+      .translate_3 {
+        left: 150px;
+        /* test 'translate: <length-percentage><length>' */
+        translate: 150px 10px 10px;
+      }
+      .rotate_3 {
+        left: 450px;
+        transform-origin: 50% 50%;
+        /* test 'rotate: <number>{3}<angle>'*/
+        rotate: 0 1 0 45deg;
+      }
+    </style>
+  </head>
+  <body>
+    <div class="scale_1 row_1"></div>
+    <div class="translate_1 row_1"></div>
+    <div class="rotate_1 row_1"></div>
+    <div class="scale_2 row_2"></div>
+    <div class="translate_2 row_2"></div>
+    <div class="rotate_2 row_2"></div>
+    <div class="scale_3 row_3"></div>
+    <div class="translate_3 row_3"></div>
+    <div class="rotate_3 row_3"></div>
+  </body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-transforms/individual-transform/individual-transform-2-ref.html b/tests/wpt/web-platform-tests/css/css-transforms/individual-transform/individual-transform-2-ref.html
new file mode 100644
index 00000000000..ee956aa301f
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-transforms/individual-transform/individual-transform-2-ref.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8">
+    <title>Individual transform: combine individual transform properties</title>
+    <link rel="author" title="CJ Ku" href="mailto:cku@mozilla.com">
+    <link rel="author" title="Mozilla" href="https://www.mozilla.org">
+    <link rel="help" href="https://drafts.csswg.org/css-transforms-2/#individual-transforms">
+    <link rel="help" href="https://drafts.csswg.org/css-transforms-2/#ctm">
+    <meta name="assert" content="Tests that we combine transforms in the correct order."/>
+    <style>
+      div {
+        position: fixed;
+        width: 100px;
+        height: 100px;
+        top: 200px;
+        left: 200px;
+        transform-origin: 0 0;
+        border-style: solid;
+        border-width: 10px 0px 10px 0px;
+        border-color: lime;
+        transform: translate(50px, 50px) rotate(45deg) scale(2, 2);
+      }
+
+    </style>
+  </head>
+  <body>
+    <div></div>
+  </body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-transforms/individual-transform/individual-transform-2a.html b/tests/wpt/web-platform-tests/css/css-transforms/individual-transform/individual-transform-2a.html
new file mode 100644
index 00000000000..3f6c97386ba
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-transforms/individual-transform/individual-transform-2a.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8">
+    <title>Individual transform: combine individual transform properties</title>
+    <link rel="author" title="CJ Ku" href="mailto:cku@mozilla.com">
+    <link rel="author" title="Mozilla" href="https://www.mozilla.org">
+    <link rel="help" href="https://drafts.csswg.org/css-transforms-2/#individual-transforms">
+    <link rel="help" href="https://drafts.csswg.org/css-transforms-2/#ctm">
+    <meta name="assert" content="Tests that we combine transforms in the correct order."/>
+    <link rel="match" href="individual-transform-2-ref.html">
+    <style>
+      div {
+        position: fixed;
+        width: 100px;
+        height: 100px;
+        top: 200px;
+        left: 200px;
+        transform-origin: 0 0;
+        border-style: solid;
+        border-width: 10px 0px 10px 0px;
+        border-color: lime;
+        translate: 50px 50px;
+        rotate: 45deg;
+        scale: 2 2;
+      }
+    </style>
+  </head>
+  <body>
+    <div></div>
+  </body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-transforms/individual-transform/individual-transform-2b.html b/tests/wpt/web-platform-tests/css/css-transforms/individual-transform/individual-transform-2b.html
new file mode 100644
index 00000000000..94dac2f10ff
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-transforms/individual-transform/individual-transform-2b.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8">
+    <title>Individual transform: combine individual transform properties</title>
+    <link rel="author" title="CJ Ku" href="mailto:cku@mozilla.com">
+    <link rel="author" title="Mozilla" href="https://www.mozilla.org">
+    <link rel="help" href="https://drafts.csswg.org/css-transforms-2/#individual-transforms">
+    <link rel="help" href="https://drafts.csswg.org/css-transforms-2/#ctm">
+    <meta name="assert" content="Tests that we combine transforms in the correct order."/>
+    <link rel="match" href="individual-transform-2-ref.html">
+    <style>
+      div {
+        position: fixed;
+        width: 100px;
+        height: 100px;
+        top: 200px;
+        left: 200px;
+        transform-origin: 0 0;
+        border-style: solid;
+        border-width: 10px 0px 10px 0px;
+        border-color: lime;
+        rotate: 45deg;
+        scale: 2 2;
+        translate: 50px 50px;
+      }
+    </style>
+  </head>
+  <body>
+    <div></div>
+  </body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-transforms/individual-transform/individual-transform-2c.html b/tests/wpt/web-platform-tests/css/css-transforms/individual-transform/individual-transform-2c.html
new file mode 100644
index 00000000000..f84ae228065
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-transforms/individual-transform/individual-transform-2c.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8">
+    <title>Individual transform: combine individual transform properties</title>
+    <link rel="author" title="CJ Ku" href="mailto:cku@mozilla.com">
+    <link rel="author" title="Mozilla" href="https://www.mozilla.org">
+    <link rel="help" href="https://drafts.csswg.org/css-transforms-2/#individual-transforms">
+    <link rel="help" href="https://drafts.csswg.org/css-transforms-2/#ctm">
+    <meta name="assert" content="Tests that we combine transforms in the correct order."/>
+    <link rel="match" href="individual-transform-2-ref.html">
+    <style>
+      div {
+        position: fixed;
+        width: 100px;
+        height: 100px;
+        top: 200px;
+        left: 200px;
+        transform-origin: 0 0;
+        border-style: solid;
+        border-width: 10px 0px 10px 0px;
+        border-color: lime;
+        translate: 50px 50px;
+        rotate: 45deg;
+        transform: scale(2, 2);
+      }
+    </style>
+  </head>
+  <body>
+    <div></div>
+  </body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-transforms/individual-transform/individual-transform-2d.html b/tests/wpt/web-platform-tests/css/css-transforms/individual-transform/individual-transform-2d.html
new file mode 100644
index 00000000000..5b5694f544e
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-transforms/individual-transform/individual-transform-2d.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8">
+    <title>Individual transform: combine individual transform properties</title>
+    <link rel="author" title="CJ Ku" href="mailto:cku@mozilla.com">
+    <link rel="author" title="Mozilla" href="https://www.mozilla.org">
+    <link rel="help" href="https://drafts.csswg.org/css-transforms-2/#individual-transforms">
+    <link rel="help" href="https://drafts.csswg.org/css-transforms-2/#ctm">
+    <meta name="assert" content="Tests that we combine transforms in the correct order."/>
+    <link rel="match" href="individual-transform-2-ref.html">
+    <style>
+      div {
+        position: fixed;
+        width: 100px;
+        height: 100px;
+        top: 200px;
+        left: 200px;
+        transform-origin: 0 0;
+        border-style: solid;
+        border-width: 10px 0px 10px 0px;
+        border-color: lime;
+        translate: 50px 50px;
+        transform: rotate(45deg) scale(2, 2);
+      }
+    </style>
+  </head>
+  <body>
+    <div></div>
+  </body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-transforms/individual-transform/individual-transform-2e.html b/tests/wpt/web-platform-tests/css/css-transforms/individual-transform/individual-transform-2e.html
new file mode 100644
index 00000000000..0350137bede
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-transforms/individual-transform/individual-transform-2e.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8">
+    <title>Individual transform: combine individual transform properties</title>
+    <link rel="author" title="CJ Ku" href="mailto:cku@mozilla.com">
+    <link rel="author" title="Mozilla" href="https://www.mozilla.org">
+    <link rel="help" href="https://drafts.csswg.org/css-transforms-2/#individual-transforms">
+    <link rel="help" href="https://drafts.csswg.org/css-transforms-2/#ctm">
+    <meta name="assert" content="Tests that we combine transforms in the correct order."/>
+    <link rel="match" href="individual-transform-2-ref.html">
+    <style>
+      div {
+        position: fixed;
+        width: 100px;
+        height: 100px;
+        top: 200px;
+        left: 200px;
+        transform-origin: 0 0;
+        border-style: solid;
+        border-width: 10px 0px 10px 0px;
+        border-color: lime;
+        translate: 0px 50px;
+        transform: translateX(50px) rotate(45deg) scale(2, 2);
+      }
+    </style>
+  </head>
+  <body>
+    <div></div>
+  </body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-transforms/transform-transformed-tr-percent-height-child-ref.html b/tests/wpt/web-platform-tests/css/css-transforms/transform-transformed-tr-percent-height-child-ref.html
new file mode 100644
index 00000000000..7e1ac99ba89
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-transforms/transform-transformed-tr-percent-height-child-ref.html
@@ -0,0 +1,38 @@
+<!doctype HTML>
+
+<title>CSS Test (Transforms): Transformed tr with percent height abspos child reference.</title>
+<link rel="author" title="Vladimir Levin" href="mailto:vmpstr@chromium.org">
+<style>
+.table {
+  width: 100px;
+  height: 100px;
+  background-color: lightblue;
+}
+.tr {
+  height: 50px;
+  background-color: lightgrey;
+}
+.contblock {
+  transform: translateX(10px);
+  width: 200px;
+  height: 200px;
+  background-color: lightyellow;
+}
+.abspos {
+  position: absolute;
+  top: 20px;
+  left: 20px;
+  width: 100%;
+  height: 100%;
+  background-color: blue;
+}
+</style>
+
+<div class="contblock">
+  <div class="table">
+    <div class="tr" style="width: 50px;"></div>
+    <div class="tr" style="width: 100px; transform: translateX(10px)">
+      <div class="abspos"></div>
+    </div>
+  </div>
+</div>
diff --git a/tests/wpt/web-platform-tests/css/css-transforms/transform-transformed-tr-percent-height-child.html b/tests/wpt/web-platform-tests/css/css-transforms/transform-transformed-tr-percent-height-child.html
new file mode 100644
index 00000000000..91f2a5f0588
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-transforms/transform-transformed-tr-percent-height-child.html
@@ -0,0 +1,48 @@
+<!doctype HTML>
+
+<title>CSS Test (Transforms): Transformed tr with percent height abspos child.</title>
+<link rel="author" title="Vladimir Levin" href="mailto:vmpstr@chromium.org">
+<link rel="help" href="http://www.w3.org/TR/css-transforms-1/#transform-rendering">
+<meta name="assert" content="This test ensures that transformed tr's percent height abspos child uses tr's height as reference.">
+<link rel="match" href="transform-transformed-tr-percent-height-child-ref.html">
+<style>
+  table, td, tr {
+    margin: 0px;
+    padding: 0px;
+    border-spacing: 0px;
+  }
+  table {
+    background-color: lightblue;
+  }
+  td {
+    width: 50px;
+    height: 50px;
+    background-color: lightgrey;
+  }
+  .contblock {
+    transform: translateX(10px);
+    width: 200px;
+    height: 200px;
+    background-color: lightyellow;
+  }
+  .abspos {
+    position: absolute;
+    top: 20px;
+    left: 20px;
+    width: 100%;
+    height: 100%;
+    background-color: blue;
+  }
+</style>
+
+<div class="contblock">
+  <table>
+    <tr>
+      <td></td>
+    </tr>
+    <tr style="transform: translateX(10px)">
+      <td></td>
+      <td><div class="abspos"></div></td>
+    </tr>
+  </table>
+</div>
diff --git a/tests/wpt/web-platform-tests/css/css-typed-om/interfaces.html b/tests/wpt/web-platform-tests/css/css-typed-om/interfaces.html
new file mode 100644
index 00000000000..e5a3638b8e6
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-typed-om/interfaces.html
@@ -0,0 +1,28 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>CSS Typed OM IDL</title>
+<link rel="help" href="https://drafts.css-houdini.org/css-typed-om-1/#idl-index">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/WebIDLParser.js"></script>
+<script src="/resources/idlharness.js"></script>
+<script>
+'use strict';
+
+promise_test(t => {
+  return fetch('/interfaces/css-typed-om.idl')
+    .then(response => response.text())
+    .then(idls => {
+      var idl_array = new IdlArray();
+      idl_array.add_idls(idls);
+      idl_array.add_untested_idls('interface Element {};');
+      idl_array.add_untested_idls('interface CSSStyleRule {};');
+      idl_array.add_untested_idls('interface ElementCSSInlineStyle {};');
+      idl_array.add_objects({
+        // TODO: Add more objects.
+      });
+      idl_array.test();
+      t.done();
+    });
+}, 'CSS Typed OM IDL test');
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-serialization/cssMathValue.tentative.html b/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-serialization/cssMathValue.tentative.html
index 814812e6a8d..fd9fce861ef 100644
--- a/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-serialization/cssMathValue.tentative.html
+++ b/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-serialization/cssMathValue.tentative.html
@@ -1,8 +1,6 @@
 <!doctype html>
 <meta charset="utf-8">
 <title>IDL-constructed CSSMathValue serialization tests</title>
-<!-- Tentative because this depends on css-values-4 spec, which is still WIP:
-     https://drafts.csswg.org/css-values-4/#calc-notation -->
 <link rel="help" href="https://drafts.css-houdini.org/css-typed-om-1/#calc-serialization">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
@@ -12,69 +10,104 @@
 
 const gTestCases = [
   {
-    description: 'CSSMathSum with 1 argument',
-    value: new CSSMathSum(CSS.px(1)),
-    cssText: 'calc(1px)',
+    description: 'CSSMathMax with one argument',
+    value: new CSSMathMax(1),
+    cssText: 'max(1)',
   },
   {
-    description: 'CSSMathSum with 2 arguments',
-    value: new CSSMathSum(CSS.px(1), CSS.px(2)),
-    cssText: 'calc(1px + 2px)',
+    description: 'CSSMathMax with more than one argument',
+    value: new CSSMathMax(1, 2, 3),
+    cssText: 'max(1, 2, 3)',
   },
   {
-    description: 'CSSMathSum with more than 2 arguments',
-    value: new CSSMathSum(CSS.px(1), CSS.px(2), CSS.px(3)),
-    cssText: 'calc((1px + 2px) + 3px)',
+    description: 'CSSMathMax containing nested CSSMathValues',
+    value: new CSSMathMax(new CSSMathSum(1, 2), 3),
+    cssText: 'max(1 + 2, 3)',
   },
   {
-    description: 'CSSMathProduct with 1 argument',
-    value: new CSSMathProduct(CSS.px(1)),
-    cssText: 'calc(1px)',
+    description: 'CSSMathMin with one argument',
+    value: new CSSMathMin(1),
+    cssText: 'min(1)',
   },
   {
-    description: 'CSSMathProduct with 2 arguments',
-    value: new CSSMathProduct(CSS.px(1), 2),
-    cssText: 'calc(1px * 2)',
+    description: 'CSSMathMin with more than one argument',
+    value: new CSSMathMin(1, 2, 3),
+    cssText: 'min(1, 2, 3)',
   },
   {
-    description: 'CSSMathProduct with more than 2 arguments',
-    value: new CSSMathProduct(CSS.px(1), 2, 3),
-    cssText: 'calc((1px * 2) * 3)',
+    description: 'CSSMathMin containing nested CSSMathValues',
+    value: new CSSMathMin(new CSSMathSum(1, 2), 3),
+    cssText: 'min(1 + 2, 3)',
   },
   {
-    description: 'CSSMathProduct of two different base types',
-    value: new CSSMathProduct(CSS.px(1), CSS.s(1)),
-    cssText: 'calc(1px * 1s)',
+    description: 'CSSMathSum with one argument',
+    value: new CSSMathSum(1),
+    cssText: 'calc(1)',
   },
   {
-    description: 'CSSMathMax with one argument',
-    value: new CSSMathMax(CSS.px(2)),
-    cssText: 'max(1px)',
+    description: 'CSSMathSum with more than one argument',
+    value: new CSSMathSum(1, 2, 3),
+    cssText: 'calc(1 + 2 + 3)',
   },
   {
-    description: 'CSSMathMax with more than one argument',
-    value: new CSSMathMax(CSS.px(2), CSS.px(1)),
-    cssText: 'max(1px, 1s)',
+    description: 'CSSMathSum with a CSSMathNegate as first value',
+    value: new CSSMathSum(new CSSMathNegate(1), 2, 3),
+    cssText: 'calc((-1) + 2 + 3)',
   },
   {
-    description: 'CSSMathMin with one argument',
-    value: new CSSMathMin(CSS.px(1)),
-    cssText: 'min(1px)',
+    description: 'CSSMathSum containing a CSSMathNegate after first value',
+    value: new CSSMathSum(1, new CSSMathNegate(2), 3),
+    cssText: 'calc(1 - 2 + 3)',
   },
   {
-    description: 'CSSMathMin with more than one argument',
-    value: new CSSMathMin(CSS.px(1), CSS.px(2)),
-    cssText: 'min(1px, 2px)',
+    description: 'CSSMathSum nested inside a CSSMathValue',
+    value: new CSSMathSum(new CSSMathSum(1, 2), 3),
+    cssText: 'calc((1 + 2) + 3)',
   },
   {
     description: 'CSSMathNegate',
-    value: new CSSMathNegate(CSS.px(1)),
-    cssText: 'calc(- 1px)',
+    value: new CSSMathNegate(1),
+    cssText: 'calc(-1)',
+  },
+  {
+    description: 'CSSMathNegate nested inside a CSSMathValue',
+    value: new CSSMathProduct(new CSSMathNegate(1)),
+    cssText: 'calc((-1))',
+  },
+  {
+    description: 'CSSMathProduct with one argument',
+    value: new CSSMathProduct(1),
+    cssText: 'calc(1)',
+  },
+  {
+    description: 'CSSMathProduct with more than one argument',
+    value: new CSSMathProduct(1, 2, 3),
+    cssText: 'calc(1 * 2 * 3)',
+  },
+  {
+    description: 'CSSMathProduct with a CSSMathInvert as first value',
+    value: new CSSMathProduct(new CSSMathInvert(1), 2, 3),
+    cssText: 'calc((1 / 1) * 2 * 3)',
+  },
+  {
+    description: 'CSSMathProduct containing a CSSMathInvert after first value',
+    value: new CSSMathProduct(1, new CSSMathInvert(2), 3),
+    cssText: 'calc(1 / 2 * 3)',
+  },
+  {
+    description: 'CSSMathProduct nested inside a CSSMathValue',
+    value: new CSSMathProduct(new CSSMathProduct(1, 2), 3),
+    cssText: 'calc((1 * 2) * 3)',
   },
   {
     description: 'CSSMathInvert',
-    value: new CSSMathInvert(CSS.px(1)),
-    cssText: 'calc(1 / 1px)',
+    value: new CSSMathInvert(1),
+    cssText: 'calc(1 / 1)',
+  },
+  {
+    description: 'CSSMathInvert nested inside a CSSMathValue',
+    value: new CSSMathSum(new CSSMathInvert(1)),
+    cssText: 'calc((1 / 1))',
   },
 ];
 
diff --git a/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-serialization/cssUnitValue.tentative.html b/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-serialization/cssUnitValue.tentative.html
index 652e0e61350..fc798ddbbfa 100644
--- a/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-serialization/cssUnitValue.tentative.html
+++ b/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-serialization/cssUnitValue.tentative.html
@@ -34,22 +34,10 @@ test(() => {
   assert_equals(result.toString(), '3.14px');
 }, 'CSSKeywordValue from DOMString modified by "value" setter serializes correctly');
 
-test(() => {
-  let result = CSSStyleValue.parse('width', '1px');
-  result.unit = 's';
-  assert_equals(result.toString(), '1s');
-}, 'CSSKeywordValue from DOMString modified by "unit" setter serializes correctly');
-
 test(t => {
   let result = createInlineStyleMap(t, 'width: 1px').get('width');
   result.value = 3.14;
   assert_equals(result.toString(), '3.14px');
 }, 'CSSKeywordValue from CSSOM modified by "value" setter serializes correctly');
 
-test(t => {
-  let result = createInlineStyleMap(t, 'width: 1px').get('width');
-  result.unit = 's';
-  assert_equals(result.toString(), '1s');
-}, 'CSSKeywordValue from CSSOM modified by "unit" setter serializes correctly');
-
 </script>
diff --git a/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-subclasses/cssPositionValue-interface.html b/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-subclasses/cssPositionValue-interface.html
deleted file mode 100644
index 0ea8632ce48..00000000000
--- a/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-subclasses/cssPositionValue-interface.html
+++ /dev/null
@@ -1,26 +0,0 @@
-<!doctype html>
-<meta charset=utf-8>
-<title>CSSPositionValue IDL</title>
-<link rel="help" href="https://drafts.css-houdini.org/css-typed-om-1/#positionvalue-objects">
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<script src="/resources/WebIDLParser.js"></script>
-<script src="/resources/idlharness.js"></script>
-<script type="text/plain" id="idl">
-[Constructor(CSSNumericValue x, CSSNumericValue y)]
-interface CSSPositionValue : CSSStyleValue {
-    attribute CSSNumericValue x;
-    attribute CSSNumericValue y;
-};
-</script>
-<script>
-'use strict';
-const idlArray = new IdlArray();
-idlArray.add_untested_idls('interface CSSStyleValue { stringifier; };');
-idlArray.add_untested_idls('interface CSSNumericValue : CSSStyleValue { };');
-idlArray.add_idls(document.getElementById('idl').textContent);
-idlArray.add_objects({
-    CSSPositionValue: ['new CSSPositionValue(new CSSUnitValue(0, "px"), new CSSUnitValue(0, "px"))']
-});
-idlArray.test();
-</script>
diff --git a/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-subclasses/cssUnparsedValue-interface.html b/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-subclasses/cssUnparsedValue-interface.html
deleted file mode 100644
index b20d0549b39..00000000000
--- a/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-subclasses/cssUnparsedValue-interface.html
+++ /dev/null
@@ -1,30 +0,0 @@
-<!doctype html>
-<meta charset=utf-8>
-<title>CSSUnparsedValue IDL</title>
-<link rel="help" href="https://drafts.css-houdini.org/css-typed-om-1/#cssunparsedvalue">
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<script src="/resources/WebIDLParser.js"></script>
-<script src="/resources/idlharness.js"></script>
-<script type="text/plain" id="idl">
-[Constructor((DOMString or CSSVariableReferenceValue)... members)]
-interface CSSUnparsedValue : CSSStyleValue {
-    iterable<(DOMString or CSSVariableReferenceValue)>;
-    readonly attribute unsigned long length;
-    getter (DOMString or CSSVariableReferenceValue) (unsigned long index);
-};
-</script>
-<script>
-'use strict';
-const idlArray = new IdlArray();
-idlArray.add_untested_idls('interface CSSStyleValue { stringifier; };');
-idlArray.add_untested_idls('interface CSSVariableReferenceValue : CSSStyleValue { };');
-idlArray.add_idls(document.getElementById('idl').textContent);
-idlArray.add_objects({
-    CSSUnparsedValue: [
-        'new CSSUnparsedValue()',
-        'new CSSUnparsedValue("foo")',
-    ]
-});
-idlArray.test();
-</script>
diff --git a/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-subclasses/cssKeywordValue-interface.html b/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-subclasses/cssUrlImageValue-interface.html
index 444e08093ed..ed86054026f 100644
--- a/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-subclasses/cssKeywordValue-interface.html
+++ b/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-subclasses/cssUrlImageValue-interface.html
@@ -1,24 +1,22 @@
 <!doctype html>
 <meta charset=utf-8>
-<title>CSSKeywordValue IDL</title>
-<link rel="help" href="https://drafts.css-houdini.org/css-typed-om-1/#keywordvalue-objects">
+<title>CSSURLImageValue IDL</title>
+<link rel="help" href="https://drafts.css-houdini.org/css-typed-om-1/#cssurlimagevalue">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script src="/resources/WebIDLParser.js"></script>
 <script src="/resources/idlharness.js"></script>
 <script type="text/plain" id="idl">
-[Constructor(DOMString value)]
-interface CSSKeywordValue : CSSStyleValue {
-    attribute DOMString value;
+[Exposed=(Window, Worker, PaintWorklet, LayoutWorklet),
+ Constructor(USVString url)]
+interface CSSURLImageValue : CSSImageValue {
+    readonly attribute USVString url;
 };
 </script>
 <script>
 'use strict';
 const idlArray = new IdlArray();
-idlArray.add_untested_idls('interface CSSStyleValue { stringifier; };');
+idlArray.add_untested_idls('interface CSSImageValue { stringifier; };');
 idlArray.add_idls(document.getElementById('idl').textContent);
-idlArray.add_objects({
-    CSSKeywordValue: ['new CSSKeywordValue("auto")']
-});
 idlArray.test();
 </script>
diff --git a/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-subclasses/cssUrlImageValue-invalid.html b/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-subclasses/cssUrlImageValue-invalid.html
new file mode 100644
index 00000000000..8d6370a223a
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-subclasses/cssUrlImageValue-invalid.html
@@ -0,0 +1,17 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>CSSURLImageValue Error Handling</title>
+<link rel="help" href="https://drafts.css-houdini.org/css-typed-om-1/#imagevalue-objects">
+<meta name="assert" content="Test CSSURLImageValue constructor error handling" />
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<body>
+<div id="log">
+<script>
+'use strict';
+
+test(() => {
+  assert_throws(new TypeError(), () => new CSSURLImageValue("file://:invalid url"));
+}, 'Constructing a CSSURLImageValue with an invalid URL throws a TypeError');
+
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-subclasses/cssUrlImageValue.html b/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-subclasses/cssUrlImageValue.html
new file mode 100644
index 00000000000..5025859d1bb
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-subclasses/cssUrlImageValue.html
@@ -0,0 +1,81 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>CSSURLImageValue</title>
+<link rel="help" href="https://drafts.css-houdini.org/css-typed-om-1/#imagevalue-objects">
+<meta name="assert" content="Test CSSURLImageValue constructor and attributes" />
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="../resources/testhelper.js"></script>
+<body>
+<div id="log">
+<script>
+'use strict';
+
+const gTestUrl = '../resources/1x1-green.png';
+const gBase64TestUrl = 'data:image/gif;base64,R0lGODlhAQABAAAAACwAAAAAAQABAAA=';
+const gBadTestUrl = document.location.href;
+
+test(() => {
+  const result = new CSSURLImageValue(gTestUrl);
+
+  assert_not_equals(result, null,
+      'A CSSURLImageValue should be created');
+  assert_equals(result.url, gTestUrl,
+      'url member should be same as passed in the constructor');
+  assert_equals(result.intrinsicWidth, null, 'intrinsicWidth');
+  assert_equals(result.intrinsicHeight, null, 'intrinsicHeight');
+  assert_equals(result.intrinsicRatio, null, 'intrinsicRatio');
+  assert_equals(result.state, 'unloaded', 'state');
+}, 'Constructing a CSSURLImageValue with a valid URL puts it in an ' +
+   'unloaded state');
+
+async_test(t => {
+  const result = new CSSURLImageValue(gTestUrl);
+  let image = loadImageResource(t, result);
+
+  image.addEventListener('load', t.step_func_done(() => {
+    assert_equals(result.url, gTestUrl,
+        'url member should be same as passed in the constructor');
+    assert_equals(result.state, 'loaded', 'state');
+    assert_equals(result.intrinsicWidth, 1,
+        'intrinsicWidth member should be width of loaded image');
+    assert_equals(result.intrinsicHeight, 1,
+        'intrinsicHeight member should be height of loaded image');
+    assert_equals(result.intrinsicRatio, 1,
+        'intrinsicRatio member should be ratio of loaded image');
+  }));
+}, 'Constructing a CSSURLImageValue from a URL sets its state to loaded');
+
+async_test(t => {
+  const result = new CSSURLImageValue(gBase64TestUrl);
+  let image = loadImageResource(t, result);
+
+  image.addEventListener('load', t.step_func_done(() => {
+    assert_equals(result.url, gBase64TestUrl,
+        'url member should be same as passed in the constructor');
+    assert_equals(result.state, 'loaded', 'state');
+    assert_equals(result.intrinsicWidth, 1,
+        'intrinsicWidth member should be width of loaded image');
+    assert_equals(result.intrinsicHeight, 1,
+        'intrinsicHeight member should be height of loaded image');
+    assert_equals(result.intrinsicRatio, 1,
+        'intrinsicRatio member should be ratio of loaded image');
+  }));
+}, 'Constructing a CSSURLImageValue from a base64 URL sets its state to loaded');
+
+async_test(t => {
+  const result = new CSSURLImageValue(gBadTestUrl);
+  let image = loadImageResource(t, result);
+
+  image.addEventListener('error', t.step_func_done(() => {
+      assert_equals(result.url, gBadTestUrl,
+        'url member should be same as passed in the constructor');
+      assert_equals(result.state, 'error', 'state');
+      assert_equals(result.intrinsicWidth, null, 'intrinsicWidth');
+      assert_equals(result.intrinsicHeight, null, 'intrinsicHeight');
+      assert_equals(result.intrinsicRatio, null, 'intrinsicRatio');
+  }));
+}, 'Constructing a CSSURLImageValue from a URL to an invalid image sets ' +
+   'its state to error');
+
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-subclasses/cssUrlImageValue.tentative.html b/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-subclasses/cssUrlImageValue.tentative.html
deleted file mode 100644
index 0f0625b4231..00000000000
--- a/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-subclasses/cssUrlImageValue.tentative.html
+++ /dev/null
@@ -1,73 +0,0 @@
-<!doctype html>
-<meta charset="utf-8">
-<title>CSSURLImageValue tests</title>
-<link rel="help" href="https://drafts.css-houdini.org/css-typed-om-1/#imagevalue-objects">
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<script src="../resources/testhelper.js"></script>
-<body>
-<script>
-'use strict';
-
-const gTestUrl = '../resources/1x1-green.png';
-const gBase64TestUrl = 'data:image/gif;base64,R0lGODlhAQABAAAAACwAAAAAAQABAAA=';
-const gBadTestUrl = document.location.href;
-
-test(() => {
-  assert_throws(new TypeError(), () => new CSSURLImageValue("file://:This is invalid url"));
-}, 'Constructing a CSSURLImageValue with an invalid URL throws a TypeError');
-
-test(() => {
-  const result = new CSSURLImageValue(gTestUrl);
-  assert_equals(result.url, gTestUrl);
-  assert_equals(result.intrinsicWidth, null);
-  assert_equals(result.intrinsicHeight, null);
-  assert_equals(result.intrinsicRatio, null);
-  assert_equals(result.state, 'unloaded');
-}, 'Constructing a CSSURLImageValue with a valid URL puts it in an unloaded state');
-
-test(() => {
-  let result = new CSSURLImageValue(gTestUrl);
-  assert_throws(new TypeError(), () => result.url = gBase64TestUrl);
-}, 'CSSURLImageValue.url is readonly');
-
-async_test(t => {
-  const result = new CSSURLImageValue(gTestUrl);
-  let image = loadImageResource(t, result);
-
-  image.addEventListener('load', t.step_func_done(() => {
-    assert_equals(result.url, gTestUrl);
-    assert_equals(result.state, 'loaded');
-    assert_equals(result.intrinsicWidth, 1);
-    assert_equals(result.intrinsicHeight, 1);
-    assert_equals(result.intrinsicRatio, 1);
-  }));
-}, 'Loading a CSSURLImageValue from a URL sets its state to loaded');
-
-async_test(t => {
-  const result = new CSSURLImageValue(gBase64TestUrl);
-  let image = loadImageResource(t, result);
-
-  image.addEventListener('load', t.step_func_done(() => {
-    assert_equals(result.url, gBase64TestUrl);
-    assert_equals(result.state, 'loaded');
-    assert_equals(result.intrinsicWidth, 1);
-    assert_equals(result.intrinsicHeight, 1);
-    assert_equals(result.intrinsicRatio, 1);
-  }));
-}, 'Loading a CSSURLImageValue from a base64 URL sets its state to loaded');
-
-async_test(t => {
-  const result = new CSSURLImageValue(gBadTestUrl);
-  let image = loadImageResource(t, result);
-
-  image.addEventListener('error', t.step_func_done(() => {
-      assert_equals(result.url, gBadTestUrl);
-      assert_equals(result.state, 'error');
-      assert_equals(result.intrinsicWidth, null);
-      assert_equals(result.intrinsicHeight, null);
-      assert_equals(result.intrinsicRatio, null);
-  }));
-}, 'Loading a CSSURLImageValue from a URL to an invalid image sets its state to error');
-
-</script>
diff --git a/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-subclasses/cssVariableReferenceValue-interface.html b/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-subclasses/cssVariableReferenceValue-interface.html
deleted file mode 100644
index 15db3276fb4..00000000000
--- a/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-subclasses/cssVariableReferenceValue-interface.html
+++ /dev/null
@@ -1,26 +0,0 @@
-<!doctype html>
-<meta charset=utf-8>
-<title>CSSVariableReferenceValue IDL</title>
-<link rel="help" href="https://drafts.css-houdini.org/css-typed-om-1/#cssvariablereferencevalue">
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<script src="/resources/WebIDLParser.js"></script>
-<script src="/resources/idlharness.js"></script>
-<script type="text/plain" id="idl">
-[Constructor(DOMString variable, optional CSSUnparsedValue fallback)]
-interface CSSVariableReferenceValue {
-    attribute DOMString variable;
-    readonly attribute CSSUnparsedValue? fallback;
-};
-</script>
-<script>
-'use strict';
-const idlArray = new IdlArray();
-idlArray.add_idls(document.getElementById('idl').textContent);
-idlArray.add_objects({
-    CSSVariableReferenceValue: [
-        'new CSSVariableReferenceValue("--foo")',
-    ]
-});
-idlArray.test();
-</script>
diff --git a/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-subclasses/numeric-objects/arithmetic.tentative.html b/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-subclasses/numeric-objects/arithmetic.tentative.html
index 4ba27517976..d58bb075ce2 100644
--- a/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-subclasses/numeric-objects/arithmetic.tentative.html
+++ b/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-subclasses/numeric-objects/arithmetic.tentative.html
@@ -144,4 +144,10 @@ test(() => {
     new CSSMathProduct(CSS.number(2), CSS.number(0.5), new CSSMathInvert(CSS.px(2)), CSS.number(2), new CSSMathInvert(new CSSMathSum(2))));
 }, 'Calling CSSNumericValue.div inverts all argument values');
 
+test(() => {
+  assert_throws(new RangeError(), () => CSS.number(2).div(CSS.number(0)));
+  assert_throws(new RangeError(), () => CSS.number(3).div(CSS.px(10) ,CSS.number(0)));
+  assert_throws(new RangeError(), () => CSS.number(2).div(CSS.number(0), CSS.number(0)));
+}, 'Can not divide with CSSUnitValue which has zero value and number type');
+
 </script>
diff --git a/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-subclasses/numeric-objects/cssUnitValue.tentative.html b/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-subclasses/numeric-objects/cssUnitValue.tentative.html
index 9e7401293e3..24769b3774e 100644
--- a/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-subclasses/numeric-objects/cssUnitValue.tentative.html
+++ b/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-subclasses/numeric-objects/cssUnitValue.tentative.html
@@ -19,26 +19,12 @@ for (const {unit, desc} of gInvalidTestUnits) {
   }, 'Constructing CSSUnitValue with ' + desc + ' as the unit throws a TypeError');
 }
 
-for (const {unit, desc} of gInvalidTestUnits) {
-  test(() => {
-    let result = new CSSUnitValue(0, 'px');
-    assert_throws(new TypeError(), () => result.unit = unit);
-    assert_equals(result.unit, 'px');
-  }, 'Updating CSSUnitValue.unit with ' + desc + ' throws a TypeError');
-}
-
 for (const unit of gValidUnits) {
   test(() => {
     const result = new CSSUnitValue(-3.14, unit);
     assert_equals(result.value, -3.14);
     assert_equals(result.unit, unit.toLowerCase());
   }, 'CSSUnitValue can be constructed with ' + unit);
-
-  test(() => {
-    let result = new CSSUnitValue(-3.14, 'px');
-    result.unit = unit
-    assert_equals(result.unit, unit.toLowerCase());
-  }, 'CSSUnitValue.unit can be updated to ' + unit);
 }
 
 </script>
diff --git a/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/interface.html b/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/interface.html
deleted file mode 100644
index 6e0301093b1..00000000000
--- a/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/interface.html
+++ /dev/null
@@ -1,47 +0,0 @@
-<!doctype html>
-<meta charset=utf-8>
-<title>StylePropertyMap IDL</title>
-<link rel="help" href="https://drafts.css-houdini.org/css-typed-om-1/#the-stylepropertymap">
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<script src="/resources/WebIDLParser.js"></script>
-<script src="/resources/idlharness.js"></script>
-<script type="text/plain" id="idl">
-interface StylePropertyMapReadOnly {
-    CSSStyleValue? get(DOMString property);
-    sequence<CSSStyleValue> getAll(DOMString property);
-    boolean has(DOMString property);
-    iterable<DOMString, (CSSStyleValue or sequence<CSSStyleValue>)>;
-    sequence<DOMString> getProperties();
-    stringifier;
-};
-
-callback UpdateFunction = CSSStyleValue (CSSStyleValue oldValue);
-
-interface StylePropertyMap : StylePropertyMapReadOnly {
-    void append(DOMString property, (CSSStyleValue or DOMString)... values);
-    void delete(DOMString property);
-    void set(DOMString property, (CSSStyleValue or DOMString)... values);
-    void update(DOMString property, UpdateFunction updateFunction);
-};
-
-partial interface Element {
-    StylePropertyMapReadOnly computedStyleMap();
-};
-
-partial interface CSSStyleRule {
-    [SameObject] readonly attribute StylePropertyMap styleMap;
-};
-
-partial interface Element {
-    [SameObject] readonly attribute StylePropertyMap attributeStyleMap;
-};
-</script>
-<script>
-'use strict';
-const idlArray = new IdlArray();
-idlArray.add_idls(document.getElementById('idl').textContent);
-idlArray.add_untested_idls('interface Element {};');
-idlArray.add_untested_idls('interface CSSStyleRule {};');
-idlArray.test();
-</script>
diff --git a/tests/wpt/web-platform-tests/css/selectors/invalidation/matches.html b/tests/wpt/web-platform-tests/css/selectors/invalidation/matches.html
index 6fd5b1fc6d9..ae5531ac5ca 100644
--- a/tests/wpt/web-platform-tests/css/selectors/invalidation/matches.html
+++ b/tests/wpt/web-platform-tests/css/selectors/invalidation/matches.html
@@ -1,7 +1,7 @@
 <!DOCTYPE html>
 <html>
   <head>
-    <title>CSS Selectors Invalidation: :any-link</title>
+    <title>CSS Selectors Invalidation: :matches()</title>
     <link rel="author" title="Victoria Su" href="mailto:victoriaytsu@google.com">
     <link rel="help" href="https://drafts.csswg.org/selectors-4/#matches">
     <meta name="assert" content="This tests that the :matches() selector is effective">
@@ -9,15 +9,38 @@
     <script src="/resources/testharnessreport.js"></script>
     <style>
       .b {
-        color: rgb(255, 255, 0); /* yellow */
+        color: yellow;
       }
       /*Simple selector arguments */
       .a :matches(.b, .c) {
-        color: rgb(255, 0, 0); /* red */
+        color: red;
       }
       /*Compound selector arguments */
       .a :matches(.c#d, .e) {
-        color: rgb(0, 255, 0); /* green */
+        color: green;
+      }
+      /* Complex selector arguments */
+      .a .g>.b {
+        color: black;
+      }
+      .a :matches(.e+.f, .g>.b, .h) {
+        color: blue;
+      }
+      .g>.b {
+        color: black;
+      }
+      .a .h {
+        color: black;
+      }
+      /* Nested */
+      .a+.c>.e {
+        color: black;
+      }
+      .a+:matches(.b+.f, :matches(.c>.e, .g)) {
+        color: red;
+      }
+      .c>.e {
+        color: black;
       }
     </style>
   </head>
@@ -38,29 +61,73 @@
       <div class="f" id="f1">
         Blue
       </div>
+      <div class="g">
+        <div class="b" id="b2">
+          Blue
+          <div class="b" id="b3">
+            Red
+          </div>
+        </div>
+      </div>
+      <div class="h" id="h1">
+        Black
+      </div>
+    </div>
+    <div class="c" id="c2">
+      <div class="e" id="e2">
+        Red
+      </div>
     </div>
     <script>
       document.body.offsetTop;
 
+      var black = "rgb(0, 0, 0)";
+      var blue = "rgb(0, 0, 255)";
+      var green = "rgb(0, 128, 0)";
+      var red = "rgb(255, 0, 0)";
+      var yellow = "rgb(255, 255, 0)";
+
       test(() => {
-        assert_equals(getComputedStyle(b1).color, "rgb(255, 255, 0)");
-        assert_equals(getComputedStyle(c1).color, "rgb(0, 0, 0)");
-        assert_equals(getComputedStyle(d).color, "rgb(0, 0, 0)");
-        assert_equals(getComputedStyle(e1).color, "rgb(0, 0, 0)");
-        assert_equals(getComputedStyle(f1).color, "rgb(0, 0, 0)");
+        assert_equals(getComputedStyle(b1).color, yellow);
+        assert_equals(getComputedStyle(b2).color, black);
+        assert_equals(getComputedStyle(b3).color, yellow);
+        assert_equals(getComputedStyle(c1).color, black);
+        assert_equals(getComputedStyle(d).color, black);
+        assert_equals(getComputedStyle(e1).color, black);
+        assert_equals(getComputedStyle(e2).color, black);
+        assert_equals(getComputedStyle(f1).color, black);
+        assert_equals(getComputedStyle(h1).color, black);
       }, "Preconditions.");
 
       test(() => {
         a1.className = "a";
-        assert_equals(getComputedStyle(b1).color, "rgb(255, 0, 0)");
-        assert_equals(getComputedStyle(c1).color, "rgb(255, 0, 0)");
+        assert_equals(getComputedStyle(b1).color, red);
+        assert_equals(getComputedStyle(b3).color, red);
+        assert_equals(getComputedStyle(c1).color, red);
       }, "Invalidate :matches() for simple selector arguments.");
 
       test(() => {
         a1.className = "a";
-        assert_equals(getComputedStyle(d).color, "rgb(0, 255, 0)");
+        assert_equals(getComputedStyle(d).color, green);
       }, "Invalidate :matches() for compound selector arguments.");
 
+      test(() => {
+        a1.className = "a";
+        assert_equals(getComputedStyle(b2).color, blue);
+        assert_equals(getComputedStyle(b3).color, red);
+        assert_equals(getComputedStyle(f1).color, blue);
+      }, "Invalidate :matches() for complex selector arguments.");
+
+      test(() => {
+        a1.className = "a";
+        assert_equals(getComputedStyle(e2).color, red);
+      }, "Invalidate nested :matches().");
+
+      test(() => {
+        a1.className = "a";
+        assert_equals(getComputedStyle(b2).color, blue);
+        assert_equals(getComputedStyle(h1).color, black);
+      }, "Test specificity of :matches().");
     </script>
   </body>
 </html>
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-001-ref.html b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-001-ref.html
index 0b87de98813..6d197e490fe 100644
--- a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-001-ref.html
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-001-ref.html
@@ -53,6 +53,10 @@
     <div class="container"><div class="alignStart"><!--normal--></div></div>
     <div class="container"><div class="alignStart"><!--stretch--></div></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><div class="alignStart"><!--baseline--></div></div>
+    <div class="container"><div class="alignEnd"><!--last baseline--></div></div>
+    <br>
     <!-- <self-position>, part 1: -->
     <div class="container"><div class="alignCenter"><!--center--></div></div>
     <div class="container"><div class="alignStart"><!--start--></div></div>
@@ -75,6 +79,10 @@
     <div class="container"><div class="alignStart"><!--normal--></div></div>
     <div class="container"><div class="alignStart"><!--stretch--></div></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><div class="alignStart"><!--baseline--></div></div>
+    <div class="container"><div class="alignEnd"><!--last baseline--></div></div>
+    <br>
     <!-- <self-position>, part 1: -->
     <div class="container"><div class="alignCenter"><!--center--></div></div>
     <div class="container"><div class="alignStart"><!--start--></div></div>
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-001.html b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-001.html
index 3fa15f1d645..99cfcbb9b4e 100644
--- a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-001.html
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-001.html
@@ -54,6 +54,10 @@
     <div class="container"><div style="justify-self: normal"></div></div>
     <div class="container"><div style="justify-self: stretch"></div></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><div style="justify-self: baseline"></div></div>
+    <div class="container"><div style="justify-self: last baseline"></div></div>
+    <br>
     <!-- <self-position>, part 1 -->
     <div class="container"><div style="justify-self: center"></div></div>
     <div class="container"><div style="justify-self: start"></div></div>
@@ -76,6 +80,10 @@
     <div class="container"><div style="justify-self: normal"></div></div>
     <div class="container"><div style="justify-self: stretch"></div></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><div style="justify-self: baseline"></div></div>
+    <div class="container"><div style="justify-self: last baseline"></div></div>
+    <br>
     <!-- <self-position>, part 1 -->
     <div class="container"><div style="justify-self: center"></div></div>
     <div class="container"><div style="justify-self: start"></div></div>
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-002-ref.html b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-002-ref.html
index 592cf8933c0..741a795f20e 100644
--- a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-002-ref.html
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-002-ref.html
@@ -51,6 +51,10 @@
     <div class="container"><div class="alignStart"><!--normal--></div></div>
     <div class="container"><div class="alignStart"><!--stretch--></div></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><div class="alignStart"><!--baseline--></div></div>
+    <div class="container"><div class="alignEnd"><!--last baseline--></div></div>
+    <br>
     <!-- <self-position>, part 1: -->
     <div class="container"><div class="alignCenter"><!--center--></div></div>
     <div class="container"><div class="alignStart"><!--start--></div></div>
@@ -73,6 +77,10 @@
     <div class="container"><div class="alignStart"><!--normal--></div></div>
     <div class="container"><div class="alignStart"><!--stretch--></div></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><div class="alignStart"><!--baseline--></div></div>
+    <div class="container"><div class="alignEnd"><!--last baseline--></div></div>
+    <br>
     <!-- <self-position>, part 1: -->
     <div class="container"><div class="alignCenter"><!--center--></div></div>
     <div class="container"><div class="alignStart"><!--start--></div></div>
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-002.html b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-002.html
index 8db71d35221..b82d308af1b 100644
--- a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-002.html
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-002.html
@@ -53,6 +53,10 @@
     <div class="container"><div style="justify-self: normal"></div></div>
     <div class="container"><div style="justify-self: stretch"></div></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><div style="justify-self: baseline"></div></div>
+    <div class="container"><div style="justify-self: last baseline"></div></div>
+    <br>
     <!-- <self-position>, part 1 -->
     <div class="container"><div style="justify-self: center"></div></div>
     <div class="container"><div style="justify-self: start"></div></div>
@@ -75,6 +79,10 @@
     <div class="container"><div style="justify-self: normal"></div></div>
     <div class="container"><div style="justify-self: stretch"></div></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><div style="justify-self: baseline"></div></div>
+    <div class="container"><div style="justify-self: last baseline"></div></div>
+    <br>
     <!-- <self-position>, part 1 -->
     <div class="container"><div style="justify-self: center"></div></div>
     <div class="container"><div style="justify-self: start"></div></div>
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-img-001-ref.html b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-img-001-ref.html
index 2fcc585581a..78d621219ab 100644
--- a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-img-001-ref.html
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-img-001-ref.html
@@ -54,6 +54,12 @@
     <div class="container"><img src="support/colors-8x16.png"
                                 class="alignStart"><!--stretch--></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><img src="support/colors-8x16.png"
+                                class="alignStart"><!--baseline--></div>
+    <div class="container"><img src="support/colors-8x16.png"
+                                class="alignEnd"><!--last baseline--></div>
+    <br>
     <!-- <self-position>, part 1: -->
     <div class="container"><img src="support/colors-8x16.png"
                                 class="alignCenter"><!--center--></div>
@@ -88,6 +94,12 @@
     <div class="container"><img src="support/colors-8x16.png"
                                 class="alignStart"><!--stretch--></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><img src="support/colors-8x16.png"
+                                class="alignStart"><!--baseline--></div>
+    <div class="container"><img src="support/colors-8x16.png"
+                                class="alignEnd"><!--last baseline--></div>
+    <br>
     <!-- <self-position>, part 1: -->
     <div class="container"><img src="support/colors-8x16.png"
                                 class="alignCenter"><!--center--></div>
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-img-001.html b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-img-001.html
index ad392ccc213..fdd4f6220be 100644
--- a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-img-001.html
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-img-001.html
@@ -53,6 +53,12 @@
     <div class="container"><img src="support/colors-8x16.png"
                                 style="justify-self: stretch"></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><img src="support/colors-8x16.png"
+                                style="justify-self: baseline"></div>
+    <div class="container"><img src="support/colors-8x16.png"
+                                style="justify-self: last baseline"></div>
+    <br>
     <!-- <self-position>, part 1 -->
     <div class="container"><img src="support/colors-8x16.png"
                                 style="justify-self: center"></div>
@@ -87,6 +93,12 @@
     <div class="container"><img src="support/colors-8x16.png"
                                 style="justify-self: stretch"></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><img src="support/colors-8x16.png"
+                                style="justify-self: baseline"></div>
+    <div class="container"><img src="support/colors-8x16.png"
+                                style="justify-self: last baseline"></div>
+    <br>
     <!-- <self-position>, part 1 -->
     <div class="container"><img src="support/colors-8x16.png"
                                 style="justify-self: center"></div>
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-img-002-ref.html b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-img-002-ref.html
index 65badb02a48..a1d4e8163fd 100644
--- a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-img-002-ref.html
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-img-002-ref.html
@@ -52,6 +52,12 @@
     <div class="container"><img src="support/colors-8x16.png"
                                 class="alignStart"><!--stretch--></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><img src="support/colors-8x16.png"
+                                class="alignStart"><!--baseline--></div>
+    <div class="container"><img src="support/colors-8x16.png"
+                                class="alignEnd"><!--last baseline--></div>
+    <br>
     <!-- <self-position>, part 1: -->
     <div class="container"><img src="support/colors-8x16.png"
                                 class="alignCenter"><!--center--></div>
@@ -86,6 +92,12 @@
     <div class="container"><img src="support/colors-8x16.png"
                                 class="alignStart"><!--stretch--></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><img src="support/colors-8x16.png"
+                                class="alignStart"><!--baseline--></div>
+    <div class="container"><img src="support/colors-8x16.png"
+                                class="alignEnd"><!--last baseline--></div>
+    <br>
     <!-- <self-position>, part 1: -->
     <div class="container"><img src="support/colors-8x16.png"
                                 class="alignCenter"><!--center--></div>
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-img-002.html b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-img-002.html
index c1747102918..61c1b97b51f 100644
--- a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-img-002.html
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-img-002.html
@@ -52,6 +52,12 @@
     <div class="container"><img src="support/colors-8x16.png"
                                 style="justify-self: stretch"></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><img src="support/colors-8x16.png"
+                                style="justify-self: baseline"></div>
+    <div class="container"><img src="support/colors-8x16.png"
+                                style="justify-self: last baseline"></div>
+    <br>
     <!-- <self-position>, part 1 -->
     <div class="container"><img src="support/colors-8x16.png"
                                 style="justify-self: center"></div>
@@ -86,6 +92,12 @@
     <div class="container"><img src="support/colors-8x16.png"
                                 style="justify-self: stretch"></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><img src="support/colors-8x16.png"
+                                style="justify-self: baseline"></div>
+    <div class="container"><img src="support/colors-8x16.png"
+                                style="justify-self: last baseline"></div>
+    <br>
     <!-- <self-position>, part 1 -->
     <div class="container"><img src="support/colors-8x16.png"
                                 style="justify-self: center"></div>
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-rtl-001-ref.html b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-rtl-001-ref.html
index a2899e07fea..8e5db1efc59 100644
--- a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-rtl-001-ref.html
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-rtl-001-ref.html
@@ -53,6 +53,10 @@
     <div class="container"><div class="alignStart"><!--normal--></div></div>
     <div class="container"><div class="alignStart"><!--stretch--></div></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><div class="alignStart"><!--baseline--></div></div>
+    <div class="container"><div class="alignEnd"><!--last baseline--></div></div>
+    <br>
     <!-- <self-position>, part 1: -->
     <div class="container"><div class="alignCenter"><!--center--></div></div>
     <div class="container"><div class="alignStart"><!--start--></div></div>
@@ -75,6 +79,10 @@
     <div class="container"><div class="alignStart"><!--normal--></div></div>
     <div class="container"><div class="alignStart"><!--stretch--></div></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><div class="alignStart"><!--baseline--></div></div>
+    <div class="container"><div class="alignEnd"><!--last baseline--></div></div>
+    <br>
     <!-- <self-position>, part 1: -->
     <div class="container"><div class="alignCenter"><!--center--></div></div>
     <div class="container"><div class="alignStart"><!--start--></div></div>
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-rtl-001.html b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-rtl-001.html
index a0a57aee0a8..18e024bf2e8 100644
--- a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-rtl-001.html
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-rtl-001.html
@@ -54,6 +54,10 @@
     <div class="container"><div style="justify-self: normal"></div></div>
     <div class="container"><div style="justify-self: stretch"></div></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><div style="justify-self: baseline"></div></div>
+    <div class="container"><div style="justify-self: last baseline"></div></div>
+    <br>
     <!-- <self-position>, part 1 -->
     <div class="container"><div style="justify-self: center"></div></div>
     <div class="container"><div style="justify-self: start"></div></div>
@@ -76,6 +80,10 @@
     <div class="container"><div style="justify-self: normal"></div></div>
     <div class="container"><div style="justify-self: stretch"></div></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><div style="justify-self: baseline"></div></div>
+    <div class="container"><div style="justify-self: last baseline"></div></div>
+    <br>
     <!-- <self-position>, part 1 -->
     <div class="container"><div style="justify-self: center"></div></div>
     <div class="container"><div style="justify-self: start"></div></div>
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-rtl-002-ref.html b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-rtl-002-ref.html
index 06312f500b5..c7176a7c210 100644
--- a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-rtl-002-ref.html
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-rtl-002-ref.html
@@ -53,6 +53,10 @@
     <div class="container"><div class="alignStart"><!--normal--></div></div>
     <div class="container"><div class="alignStart"><!--stretch--></div></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><div class="alignStart"><!--baseline--></div></div>
+    <div class="container"><div class="alignEnd"><!--last baseline--></div></div>
+    <br>
     <!-- <self-position>, part 1: -->
     <div class="container"><div class="alignCenter"><!--center--></div></div>
     <div class="container"><div class="alignStart"><!--start--></div></div>
@@ -75,6 +79,10 @@
     <div class="container"><div class="alignStart"><!--normal--></div></div>
     <div class="container"><div class="alignStart"><!--stretch--></div></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><div class="alignStart"><!--baseline--></div></div>
+    <div class="container"><div class="alignEnd"><!--last baseline--></div></div>
+    <br>
     <!-- <self-position>, part 1: -->
     <div class="container"><div class="alignCenter"><!--center--></div></div>
     <div class="container"><div class="alignStart"><!--start--></div></div>
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-rtl-002.html b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-rtl-002.html
index a309859b5b4..d7e510e1b5e 100644
--- a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-rtl-002.html
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-rtl-002.html
@@ -55,6 +55,10 @@
     <div class="container"><div style="justify-self: normal"></div></div>
     <div class="container"><div style="justify-self: stretch"></div></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><div style="justify-self: baseline"></div></div>
+    <div class="container"><div style="justify-self: last baseline"></div></div>
+    <br>
     <!-- <self-position>, part 1 -->
     <div class="container"><div style="justify-self: center"></div></div>
     <div class="container"><div style="justify-self: start"></div></div>
@@ -77,6 +81,10 @@
     <div class="container"><div style="justify-self: normal"></div></div>
     <div class="container"><div style="justify-self: stretch"></div></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><div style="justify-self: baseline"></div></div>
+    <div class="container"><div style="justify-self: last baseline"></div></div>
+    <br>
     <!-- <self-position>, part 1 -->
     <div class="container"><div style="justify-self: center"></div></div>
     <div class="container"><div style="justify-self: start"></div></div>
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-rtl-003-ref.html b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-rtl-003-ref.html
index 9c243ac5f36..b38590c8021 100644
--- a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-rtl-003-ref.html
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-rtl-003-ref.html
@@ -51,6 +51,10 @@
     <div class="container"><div class="alignStart"><!--normal--></div></div>
     <div class="container"><div class="alignStart"><!--stretch--></div></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><div class="alignStart"><!--baseline--></div></div>
+    <div class="container"><div class="alignEnd"><!--last baseline--></div></div>
+    <br>
     <!-- <self-position>, part 1: -->
     <div class="container"><div class="alignCenter"><!--center--></div></div>
     <div class="container"><div class="alignStart"><!--start--></div></div>
@@ -73,6 +77,10 @@
     <div class="container"><div class="alignStart"><!--normal--></div></div>
     <div class="container"><div class="alignStart"><!--stretch--></div></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><div class="alignStart"><!--baseline--></div></div>
+    <div class="container"><div class="alignEnd"><!--last baseline--></div></div>
+    <br>
     <!-- <self-position>, part 1: -->
     <div class="container"><div class="alignCenter"><!--center--></div></div>
     <div class="container"><div class="alignStart"><!--start--></div></div>
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-rtl-003.html b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-rtl-003.html
index 19cf377cad2..2224ff684af 100644
--- a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-rtl-003.html
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-rtl-003.html
@@ -53,6 +53,10 @@
     <div class="container"><div style="justify-self: normal"></div></div>
     <div class="container"><div style="justify-self: stretch"></div></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><div style="justify-self: baseline"></div></div>
+    <div class="container"><div style="justify-self: last baseline"></div></div>
+    <br>
     <!-- <self-position>, part 1 -->
     <div class="container"><div style="justify-self: center"></div></div>
     <div class="container"><div style="justify-self: start"></div></div>
@@ -75,6 +79,10 @@
     <div class="container"><div style="justify-self: normal"></div></div>
     <div class="container"><div style="justify-self: stretch"></div></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><div style="justify-self: baseline"></div></div>
+    <div class="container"><div style="justify-self: last baseline"></div></div>
+    <br>
     <!-- <self-position>, part 1 -->
     <div class="container"><div style="justify-self: center"></div></div>
     <div class="container"><div style="justify-self: start"></div></div>
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-rtl-004-ref.html b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-rtl-004-ref.html
index 3cbad644b49..1ebc9e62c97 100644
--- a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-rtl-004-ref.html
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-rtl-004-ref.html
@@ -51,6 +51,10 @@
     <div class="container"><div class="alignStart"><!--normal--></div></div>
     <div class="container"><div class="alignStart"><!--stretch--></div></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><div class="alignStart"><!--baseline--></div></div>
+    <div class="container"><div class="alignEnd"><!--last baseline--></div></div>
+    <br>
     <!-- <self-position>, part 1: -->
     <div class="container"><div class="alignCenter"><!--center--></div></div>
     <div class="container"><div class="alignStart"><!--start--></div></div>
@@ -73,6 +77,10 @@
     <div class="container"><div class="alignStart"><!--normal--></div></div>
     <div class="container"><div class="alignStart"><!--stretch--></div></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><div class="alignStart"><!--baseline--></div></div>
+    <div class="container"><div class="alignEnd"><!--last baseline--></div></div>
+    <br>
     <!-- <self-position>, part 1: -->
     <div class="container"><div class="alignCenter"><!--center--></div></div>
     <div class="container"><div class="alignStart"><!--start--></div></div>
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-rtl-004.html b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-rtl-004.html
index f8170a80d37..a22fdc24fb7 100644
--- a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-rtl-004.html
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-rtl-004.html
@@ -54,6 +54,10 @@
     <div class="container"><div style="justify-self: normal"></div></div>
     <div class="container"><div style="justify-self: stretch"></div></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><div style="justify-self: baseline"></div></div>
+    <div class="container"><div style="justify-self: last baseline"></div></div>
+    <br>
     <!-- <self-position>, part 1 -->
     <div class="container"><div style="justify-self: center"></div></div>
     <div class="container"><div style="justify-self: start"></div></div>
@@ -76,6 +80,10 @@
     <div class="container"><div style="justify-self: normal"></div></div>
     <div class="container"><div style="justify-self: stretch"></div></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><div style="justify-self: baseline"></div></div>
+    <div class="container"><div style="justify-self: last baseline"></div></div>
+    <br>
     <!-- <self-position>, part 1 -->
     <div class="container"><div style="justify-self: center"></div></div>
     <div class="container"><div style="justify-self: start"></div></div>
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-vertWM-001-ref.html b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-vertWM-001-ref.html
index 0b40e42550b..9fff3eabcc0 100644
--- a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-vertWM-001-ref.html
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-vertWM-001-ref.html
@@ -55,6 +55,10 @@
     <div class="container"><div class="alignStart"><!--normal--></div></div>
     <div class="container"><div class="alignStart"><!--stretch--></div></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><div class="alignStart"><!--baseline--></div></div>
+    <div class="container"><div class="alignEnd"><!--last baseline--></div></div>
+    <br>
     <!-- <self-position>, part 1: -->
     <div class="container"><div class="alignCenter"><!--center--></div></div>
     <div class="container"><div class="alignStart"><!--start--></div></div>
@@ -77,6 +81,10 @@
     <div class="container"><div class="alignStart"><!--normal--></div></div>
     <div class="container"><div class="alignStart"><!--stretch--></div></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><div class="alignStart"><!--baseline--></div></div>
+    <div class="container"><div class="alignEnd"><!--last baseline--></div></div>
+    <br>
     <!-- <self-position>, part 1: -->
     <div class="container"><div class="alignCenter"><!--center--></div></div>
     <div class="container"><div class="alignStart"><!--start--></div></div>
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-vertWM-001.html b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-vertWM-001.html
index d3ce4007d91..1bc2a5c3386 100644
--- a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-vertWM-001.html
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-vertWM-001.html
@@ -53,6 +53,10 @@
     <div class="container"><div style="justify-self: normal"></div></div>
     <div class="container"><div style="justify-self: stretch"></div></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><div style="justify-self: baseline"></div></div>
+    <div class="container"><div style="justify-self: last baseline"></div></div>
+    <br>
     <!-- <self-position>, part 1 -->
     <div class="container"><div style="justify-self: center"></div></div>
     <div class="container"><div style="justify-self: start"></div></div>
@@ -75,6 +79,10 @@
     <div class="container"><div style="justify-self: normal"></div></div>
     <div class="container"><div style="justify-self: stretch"></div></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><div style="justify-self: baseline"></div></div>
+    <div class="container"><div style="justify-self: last baseline"></div></div>
+    <br>
     <!-- <self-position>, part 1 -->
     <div class="container"><div style="justify-self: center"></div></div>
     <div class="container"><div style="justify-self: start"></div></div>
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-vertWM-002-ref.html b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-vertWM-002-ref.html
index 0b40e42550b..9fff3eabcc0 100644
--- a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-vertWM-002-ref.html
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-vertWM-002-ref.html
@@ -55,6 +55,10 @@
     <div class="container"><div class="alignStart"><!--normal--></div></div>
     <div class="container"><div class="alignStart"><!--stretch--></div></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><div class="alignStart"><!--baseline--></div></div>
+    <div class="container"><div class="alignEnd"><!--last baseline--></div></div>
+    <br>
     <!-- <self-position>, part 1: -->
     <div class="container"><div class="alignCenter"><!--center--></div></div>
     <div class="container"><div class="alignStart"><!--start--></div></div>
@@ -77,6 +81,10 @@
     <div class="container"><div class="alignStart"><!--normal--></div></div>
     <div class="container"><div class="alignStart"><!--stretch--></div></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><div class="alignStart"><!--baseline--></div></div>
+    <div class="container"><div class="alignEnd"><!--last baseline--></div></div>
+    <br>
     <!-- <self-position>, part 1: -->
     <div class="container"><div class="alignCenter"><!--center--></div></div>
     <div class="container"><div class="alignStart"><!--start--></div></div>
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-vertWM-002.html b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-vertWM-002.html
index 03078a6b448..7b72c6aaeb1 100644
--- a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-vertWM-002.html
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-vertWM-002.html
@@ -54,6 +54,10 @@
     <div class="container"><div style="justify-self: normal"></div></div>
     <div class="container"><div style="justify-self: stretch"></div></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><div style="justify-self: baseline"></div></div>
+    <div class="container"><div style="justify-self: last baseline"></div></div>
+    <br>
     <!-- <self-position>, part 1 -->
     <div class="container"><div style="justify-self: center"></div></div>
     <div class="container"><div style="justify-self: start"></div></div>
@@ -76,6 +80,10 @@
     <div class="container"><div style="justify-self: normal"></div></div>
     <div class="container"><div style="justify-self: stretch"></div></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><div style="justify-self: baseline"></div></div>
+    <div class="container"><div style="justify-self: last baseline"></div></div>
+    <br>
     <!-- <self-position>, part 1 -->
     <div class="container"><div style="justify-self: center"></div></div>
     <div class="container"><div style="justify-self: start"></div></div>
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-vertWM-003-ref.html b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-vertWM-003-ref.html
index ecc148a3215..15507845661 100644
--- a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-vertWM-003-ref.html
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-vertWM-003-ref.html
@@ -53,6 +53,10 @@
     <div class="container"><div class="alignStart"><!--normal--></div></div>
     <div class="container"><div class="alignStart"><!--stretch--></div></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><div class="alignStart"><!--baseline--></div></div>
+    <div class="container"><div class="alignEnd"><!--last baseline--></div></div>
+    <br>
     <!-- <self-position>, part 1: -->
     <div class="container"><div class="alignCenter"><!--center--></div></div>
     <div class="container"><div class="alignStart"><!--start--></div></div>
@@ -75,6 +79,10 @@
     <div class="container"><div class="alignStart"><!--normal--></div></div>
     <div class="container"><div class="alignStart"><!--stretch--></div></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><div class="alignStart"><!--baseline--></div></div>
+    <div class="container"><div class="alignEnd"><!--last baseline--></div></div>
+    <br>
     <!-- <self-position>, part 1: -->
     <div class="container"><div class="alignCenter"><!--center--></div></div>
     <div class="container"><div class="alignStart"><!--start--></div></div>
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-vertWM-003.html b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-vertWM-003.html
index e6a712d00da..582262bd3de 100644
--- a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-vertWM-003.html
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-vertWM-003.html
@@ -52,6 +52,10 @@
     <div class="container"><div style="justify-self: normal"></div></div>
     <div class="container"><div style="justify-self: stretch"></div></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><div style="justify-self: baseline"></div></div>
+    <div class="container"><div style="justify-self: last baseline"></div></div>
+    <br>
     <!-- <self-position>, part 1 -->
     <div class="container"><div style="justify-self: center"></div></div>
     <div class="container"><div style="justify-self: start"></div></div>
@@ -74,6 +78,10 @@
     <div class="container"><div style="justify-self: normal"></div></div>
     <div class="container"><div style="justify-self: stretch"></div></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><div style="justify-self: baseline"></div></div>
+    <div class="container"><div style="justify-self: last baseline"></div></div>
+    <br>
     <!-- <self-position>, part 1 -->
     <div class="container"><div style="justify-self: center"></div></div>
     <div class="container"><div style="justify-self: start"></div></div>
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-vertWM-004-ref.html b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-vertWM-004-ref.html
index ecc148a3215..15507845661 100644
--- a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-vertWM-004-ref.html
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-vertWM-004-ref.html
@@ -53,6 +53,10 @@
     <div class="container"><div class="alignStart"><!--normal--></div></div>
     <div class="container"><div class="alignStart"><!--stretch--></div></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><div class="alignStart"><!--baseline--></div></div>
+    <div class="container"><div class="alignEnd"><!--last baseline--></div></div>
+    <br>
     <!-- <self-position>, part 1: -->
     <div class="container"><div class="alignCenter"><!--center--></div></div>
     <div class="container"><div class="alignStart"><!--start--></div></div>
@@ -75,6 +79,10 @@
     <div class="container"><div class="alignStart"><!--normal--></div></div>
     <div class="container"><div class="alignStart"><!--stretch--></div></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><div class="alignStart"><!--baseline--></div></div>
+    <div class="container"><div class="alignEnd"><!--last baseline--></div></div>
+    <br>
     <!-- <self-position>, part 1: -->
     <div class="container"><div class="alignCenter"><!--center--></div></div>
     <div class="container"><div class="alignStart"><!--start--></div></div>
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-vertWM-004.html b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-vertWM-004.html
index 070829ba8c6..63c893b6c4f 100644
--- a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-vertWM-004.html
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-vertWM-004.html
@@ -53,6 +53,10 @@
     <div class="container"><div style="justify-self: normal"></div></div>
     <div class="container"><div style="justify-self: stretch"></div></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><div style="justify-self: baseline"></div></div>
+    <div class="container"><div style="justify-self: last baseline"></div></div>
+    <br>
     <!-- <self-position>, part 1 -->
     <div class="container"><div style="justify-self: center"></div></div>
     <div class="container"><div style="justify-self: start"></div></div>
@@ -75,6 +79,10 @@
     <div class="container"><div style="justify-self: normal"></div></div>
     <div class="container"><div style="justify-self: stretch"></div></div>
     <br>
+    <!-- <baseline-position> -->
+    <div class="container"><div style="justify-self: baseline"></div></div>
+    <div class="container"><div style="justify-self: last baseline"></div></div>
+    <br>
     <!-- <self-position>, part 1 -->
     <div class="container"><div style="justify-self: center"></div></div>
     <div class="container"><div style="justify-self: start"></div></div>
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/flexbox/flexbox-mbp-horiz-004-ref.xhtml b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/flexbox/flexbox-mbp-horiz-004-ref.xhtml
index 00db4823e35..245e6f9e3c9 100644
--- a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/flexbox/flexbox-mbp-horiz-004-ref.xhtml
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/flexbox/flexbox-mbp-horiz-004-ref.xhtml
@@ -4,8 +4,7 @@
      http://creativecommons.org/publicdomain/zero/1.0/
 -->
 <!-- Reference case - identical to the testcase, but with with the flex items'
-     vertical margin and padding values set to 0 by default, and then set to
-     specific pixel values for the items that have a 50px percent-basis.
+     margin and padding values set to explicit pixel values.
 -->
 <html xmlns="http://www.w3.org/1999/xhtml">
   <head>
@@ -21,27 +20,11 @@
       }
       div.height50 { height: 50px; }
 
-      .marginA  { margin:  0  8% 0  4%; }
-      .marginB  { margin:  0 10% 0 14%; }
-      .paddingA { padding: 0  6% 0  2%; }
-      .paddingB { padding: 0  8% 0 12%; }
+      .marginA  { margin:  20px 16px 12px  8px; }
+      .marginB  { margin:  16px 20px 24px 28px; }
+      .paddingA { padding: 16px 12px  8px  4px; }
+      .paddingB { padding: 12px 16px 20px 24px; }
 
-      div.height50 > .marginA {
-        margin-top: 5px;
-        margin-bottom: 3px;
-      }
-      div.height50 > .marginB {
-        margin-top: 4px;
-        margin-bottom: 6px;
-      }
-      div.height50 > .paddingA {
-        padding-top: 4px;
-        padding-bottom: 2px;
-      }
-      div.height50 > .paddingB {
-        padding-top: 3px;
-        padding-bottom: 5px;
-      }
 
       div.child1 {
         flex: none;
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/flexbox/flexbox-mbp-horiz-004.xhtml b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/flexbox/flexbox-mbp-horiz-004.xhtml
index 545e54f71d2..b513253fd19 100644
--- a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/flexbox/flexbox-mbp-horiz-004.xhtml
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/flexbox/flexbox-mbp-horiz-004.xhtml
@@ -3,19 +3,17 @@
      Any copyright is dedicated to the Public Domain.
      http://creativecommons.org/publicdomain/zero/1.0/
 -->
-<!-- Testcase with percent-valued padding and/or margin on flex items. The spec
-     says that percentage values on padding/margin-top and -bottom should be
-     resolved against the flex container's height (not its width, as would
-     be the case in a block).
+<!-- Testcase with percent-valued padding and/or margin on flex items.
+     The spec allows these to be resolved against the flex container's
+     inline size (regardless of which axis the percent padding/margin is in).
 -->
 <html xmlns="http://www.w3.org/1999/xhtml">
   <head>
     <title>CSS Test: Testing percent-valued padding and margin on flex items</title>
     <link rel="author" title="Daniel Holbert" href="mailto:dholbert@mozilla.com"/>
-    <link rel="help" href="http://www.w3.org/TR/css-flexbox-1/#layout-algorithm"/>
+    <link rel="help" href="https://www.w3.org/TR/css-flexbox-1/#item-margins"/>
     <link rel="match" href="flexbox-mbp-horiz-004-ref.xhtml"/>
     <style>
-      div { border: 0; }
       div.flexbox {
         width: 200px;
         display: flex;
@@ -52,8 +50,9 @@
     </style>
   </head>
   <body>
-    <!-- Flex container is auto-height - vertical margin and padding should
-         resolve to 0, since they don't have anything to resolve % against. -->
+    <!-- Flex container is auto-height - this shouldn't impact percent
+         margin/padding resolution, since they resolve against container's
+         inline-size, i.e. its width in this case. -->
     <div class="flexbox"
          ><div class="child1 paddingA"><div class="filler"/></div
          ><div class="child2 paddingB"><div class="filler"/></div
@@ -61,8 +60,9 @@
          ><div class="child2 marginB"></div
     ></div>
 
-    <!-- Flex container has height: 50px - vertical margin and padding should
-         resolve % values against that. -->
+    <!-- Flex container has height: 50px - again, this shouldn't impact percent
+         margin/padding resolution, since they resolve against container's
+         inline-size, i.e. its width in this case. -->
     <div class="flexbox height50"
          ><div class="child1 paddingA"><div class="filler"/></div
          ><div class="child2 paddingB"><div class="filler"/></div
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/multicol3/broken-column-rule-1-ref.html b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/multicol3/broken-column-rule-1-ref.html
new file mode 100644
index 00000000000..c696d079f43
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/multicol3/broken-column-rule-1-ref.html
@@ -0,0 +1,31 @@
+<!DOCTYPE HTML>
+<title>CSS Test Reference: breaking of column rule</title>
+<meta charset="utf-8">
+<link rel="author" title="L. David Baron" href="https://dbaron.org/">
+<style>
+
+.ref1, .ref2 {
+  display: inline-block;
+  vertical-align: top;
+
+  border: 2px solid blue;
+  border-top: none;
+  border-bottom: none;
+}
+
+.ref1 {
+  margin-left:49px;
+  height: 100px;
+  width: 148px;
+}
+
+.ref2 {
+  margin-left: 148px;
+  height: 50px;
+  width: 10px;
+
+  border-right: none;
+}
+
+</style>
+<span class="ref1"></span><span class="ref2"></span>
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/multicol3/broken-column-rule-1.html b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/multicol3/broken-column-rule-1.html
new file mode 100644
index 00000000000..13deaa72cb7
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/multicol3/broken-column-rule-1.html
@@ -0,0 +1,34 @@
+<!DOCTYPE HTML>
+<title>CSS Test: breaking of column rule</title>
+<meta charset="utf-8">
+<link rel="author" title="L. David Baron" href="https://dbaron.org/">
+<link rel="help" href="https://drafts.csswg.org/css-multicol/#column-gaps-and-rules">
+<link rel="match" href="broken-column-rule-1-ref.html">
+<style>
+
+.outer {
+  height: 100px;
+  column-fill: auto;
+  width: 550px;
+  column-count: 4;
+  column-gap: 50px;
+  /* leaves 100px for each column */
+}
+
+.inner {
+  column-count: 2;
+  column-rule: 2px solid blue;
+  height: 250px;
+}
+
+.fill {
+  height: 500px; /* work around https://bugzilla.mozilla.org/show_bug.cgi?id=1374479#c4 */
+}
+
+</style>
+
+<div class="outer">
+  <div class="inner">
+    <div class="fill"></div>
+  </div>
+</div>
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/multicol3/reftest.list b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/multicol3/reftest.list
index 52e87560ed4..35102af64b6 100644
--- a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/multicol3/reftest.list
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/multicol3/reftest.list
@@ -1,2 +1,3 @@
+== broken-column-rule-1.html broken-column-rule-1-ref.html
 == moz-multicol3-column-balancing-break-inside-avoid-1.html moz-multicol3-column-balancing-break-inside-avoid-1-ref.html
 == multicol-height-002.xht reference/multicol-height-002.xht
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/transforms/individual-transform-1-ref.html b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/transforms/individual-transform-1-ref.html
new file mode 100644
index 00000000000..8a568d25d92
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/transforms/individual-transform-1-ref.html
@@ -0,0 +1,90 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8">
+    <title>Individual transform: compare individual transform with transform functions</title>
+    <link rel="author" title="CJ Ku" href="mailto:cku@mozilla.com">
+    <link rel="author" title="Mozilla" href="https://www.mozilla.org">
+    <link rel="help" href="https://drafts.csswg.org/css-transforms-2/#individual-transforms">
+    <meta name="assert" content="Tests whether individaul transform works correctlyi by compare the rendering result with transfrom functions of the 'transform' property."/>
+    <style>
+      div {
+        position: fixed;
+        width: 100px;
+        height: 100px;
+        transform-origin: 0 0;
+        border-style: solid;
+        border-width: 10px 0px 10px 0px;
+        border-color: lime;
+      }
+      .row_1 {
+        top: 100px;
+      }
+      .scale_1{
+        left: 100px;
+        width: 50px;
+        height: 100px;
+        transform: scaleX(2);
+      }
+      .translate_1 {
+        left: 150px;
+        transform: translateX(150px);
+      }
+      .rotate_1 {
+        left: 450px;
+        transform-origin: 50% 50%;
+        transform: rotate(90deg);
+      }
+
+      .row_2 {
+        top: 250px;
+      }
+      .scale_2{
+        left: 100px;
+        width: 50px;
+        height: 50px;
+        transform: scale(2, 2);
+      }
+      .translate_2 {
+        left: 150px;
+        top: 200px;
+        transform: translate(150px, 50px);
+      }
+      .rotate_2 {
+        left: 450px;
+        transform-origin: 50% 50%;
+        transform: rotate3d(0, 0, 1, 90deg);
+      }
+      .row_3 {
+        transform: perspective(500px);
+        top: 400px;
+      }
+      .scale_3{
+        left: 100px;
+        width: 50px;
+        height: 50px;
+        transform: scale3d(2, 2, 2);
+      }
+      .translate_3 {
+        left: 150px;
+        transform: translate3d(150px, 10px, 10px);
+      }
+      .rotate_3 {
+        left: 450px;
+        transform-origin: 50% 50%;
+        transform: rotate3d(0, 1, 0, 45deg);
+      }
+    </style>
+  </head>
+  <body>
+    <div class="scale_1 row_1"></div>
+    <div class="translate_1 row_1"></div>
+    <div class="rotate_1 row_1"></div>
+    <div class="scale_2 row_2"></div>
+    <div class="translate_2 row_2"></div>
+    <div class="rotate_2 row_2"></div>
+    <div class="scale_3 row_3"></div>
+    <div class="translate_3 row_3"></div>
+    <div class="rotate_3 row_3"></div>
+  </body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/transforms/individual-transform-1.html b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/transforms/individual-transform-1.html
new file mode 100644
index 00000000000..4f83e2eac47
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/transforms/individual-transform-1.html
@@ -0,0 +1,100 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8">
+    <title>Individual transform: compare individual transform with transform functions</title>
+    <link rel="author" title="CJ Ku" href="mailto:cku@mozilla.com">
+    <link rel="author" title="Mozilla" href="https://www.mozilla.org">
+    <link rel="help" href="https://drafts.csswg.org/css-transforms-2/#individual-transforms">
+    <meta name="assert" content="Tests whether individaul transform works correctlyi by compare the rendering result with transfrom functions of the 'transform' property."/>
+    <link rel="match" href="individual-transform-1-ref.html">
+    <style>
+      div {
+        position: fixed;
+        width: 100px;
+        height: 100px;
+        transform-origin: 0 0;
+        border-style: solid;
+        border-width: 10px 0px 10px 0px;
+        border-color: lime;
+      }
+      .row_1 {
+        top: 100px;
+      }
+      .scale_1{
+        left: 100px;
+        width: 50px;
+        height: 100px;
+        /* test 'scale: <number>' */
+        scale: 2;
+      }
+      .translate_1 {
+        left: 150px;
+        /* test 'translate: <length-percentage>' */
+        translate: 150px;
+      }
+      .rotate_1 {
+        left: 450px;
+        transform-origin: 50% 50%;
+        /* test 'rota: te<angle>' */
+        rotate: 90deg;
+      }
+
+      .row_2 {
+        top: 250px;
+      }
+      .scale_2{
+        left: 100px;
+        width: 50px;
+        height: 50px;
+        /* test 'scale: <number>{2}'' */
+        scale: 2 2;
+      }
+      .translate_2 {
+        left: 150px;
+        top: 200px;
+        /* test 'translate: <length-percentage><length-percentage>' */
+        translate: 150px 50px;
+      }
+      .rotate_2 {
+        left: 450px;
+        transform-origin: 50% 50%;
+        /* test 'rotate: <number>{3}<angle>'*/
+        rotate: 0 0 1 90deg;
+      }
+      .row_3 {
+        transform: perspective(500px);
+        top: 400px;
+      }
+      .scale_3{
+        left: 100px;
+        width: 50px;
+        height: 50px;
+        /* test 'scale: <number>{3}'' */
+        scale: 2 2 2;
+      }
+      .translate_3 {
+        left: 150px;
+        /* test 'translate: <length-percentage><length>' */
+        translate: 150px 10px 10px;
+      }
+      .rotate_3 {
+        left: 450px;
+        transform-origin: 50% 50%;
+        /* test 'rotate: <number>{3}<angle>'*/
+        rotate: 0 1 0 45deg;
+      }
+    </style>
+  </head>
+  <body>
+    <div class="scale_1 row_1"></div>
+    <div class="translate_1 row_1"></div>
+    <div class="rotate_1 row_1"></div>
+    <div class="scale_2 row_2"></div>
+    <div class="translate_2 row_2"></div>
+    <div class="rotate_2 row_2"></div>
+    <div class="scale_3 row_3"></div>
+    <div class="translate_3 row_3"></div>
+    <div class="rotate_3 row_3"></div>
+  </body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/transforms/individual-transform-2-ref.html b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/transforms/individual-transform-2-ref.html
new file mode 100644
index 00000000000..ee956aa301f
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/transforms/individual-transform-2-ref.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8">
+    <title>Individual transform: combine individual transform properties</title>
+    <link rel="author" title="CJ Ku" href="mailto:cku@mozilla.com">
+    <link rel="author" title="Mozilla" href="https://www.mozilla.org">
+    <link rel="help" href="https://drafts.csswg.org/css-transforms-2/#individual-transforms">
+    <link rel="help" href="https://drafts.csswg.org/css-transforms-2/#ctm">
+    <meta name="assert" content="Tests that we combine transforms in the correct order."/>
+    <style>
+      div {
+        position: fixed;
+        width: 100px;
+        height: 100px;
+        top: 200px;
+        left: 200px;
+        transform-origin: 0 0;
+        border-style: solid;
+        border-width: 10px 0px 10px 0px;
+        border-color: lime;
+        transform: translate(50px, 50px) rotate(45deg) scale(2, 2);
+      }
+
+    </style>
+  </head>
+  <body>
+    <div></div>
+  </body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/transforms/individual-transform-2a.html b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/transforms/individual-transform-2a.html
new file mode 100644
index 00000000000..3f6c97386ba
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/transforms/individual-transform-2a.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8">
+    <title>Individual transform: combine individual transform properties</title>
+    <link rel="author" title="CJ Ku" href="mailto:cku@mozilla.com">
+    <link rel="author" title="Mozilla" href="https://www.mozilla.org">
+    <link rel="help" href="https://drafts.csswg.org/css-transforms-2/#individual-transforms">
+    <link rel="help" href="https://drafts.csswg.org/css-transforms-2/#ctm">
+    <meta name="assert" content="Tests that we combine transforms in the correct order."/>
+    <link rel="match" href="individual-transform-2-ref.html">
+    <style>
+      div {
+        position: fixed;
+        width: 100px;
+        height: 100px;
+        top: 200px;
+        left: 200px;
+        transform-origin: 0 0;
+        border-style: solid;
+        border-width: 10px 0px 10px 0px;
+        border-color: lime;
+        translate: 50px 50px;
+        rotate: 45deg;
+        scale: 2 2;
+      }
+    </style>
+  </head>
+  <body>
+    <div></div>
+  </body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/transforms/individual-transform-2b.html b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/transforms/individual-transform-2b.html
new file mode 100644
index 00000000000..94dac2f10ff
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/transforms/individual-transform-2b.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8">
+    <title>Individual transform: combine individual transform properties</title>
+    <link rel="author" title="CJ Ku" href="mailto:cku@mozilla.com">
+    <link rel="author" title="Mozilla" href="https://www.mozilla.org">
+    <link rel="help" href="https://drafts.csswg.org/css-transforms-2/#individual-transforms">
+    <link rel="help" href="https://drafts.csswg.org/css-transforms-2/#ctm">
+    <meta name="assert" content="Tests that we combine transforms in the correct order."/>
+    <link rel="match" href="individual-transform-2-ref.html">
+    <style>
+      div {
+        position: fixed;
+        width: 100px;
+        height: 100px;
+        top: 200px;
+        left: 200px;
+        transform-origin: 0 0;
+        border-style: solid;
+        border-width: 10px 0px 10px 0px;
+        border-color: lime;
+        rotate: 45deg;
+        scale: 2 2;
+        translate: 50px 50px;
+      }
+    </style>
+  </head>
+  <body>
+    <div></div>
+  </body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/transforms/individual-transform-2c.html b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/transforms/individual-transform-2c.html
new file mode 100644
index 00000000000..f84ae228065
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/transforms/individual-transform-2c.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8">
+    <title>Individual transform: combine individual transform properties</title>
+    <link rel="author" title="CJ Ku" href="mailto:cku@mozilla.com">
+    <link rel="author" title="Mozilla" href="https://www.mozilla.org">
+    <link rel="help" href="https://drafts.csswg.org/css-transforms-2/#individual-transforms">
+    <link rel="help" href="https://drafts.csswg.org/css-transforms-2/#ctm">
+    <meta name="assert" content="Tests that we combine transforms in the correct order."/>
+    <link rel="match" href="individual-transform-2-ref.html">
+    <style>
+      div {
+        position: fixed;
+        width: 100px;
+        height: 100px;
+        top: 200px;
+        left: 200px;
+        transform-origin: 0 0;
+        border-style: solid;
+        border-width: 10px 0px 10px 0px;
+        border-color: lime;
+        translate: 50px 50px;
+        rotate: 45deg;
+        transform: scale(2, 2);
+      }
+    </style>
+  </head>
+  <body>
+    <div></div>
+  </body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/transforms/individual-transform-2d.html b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/transforms/individual-transform-2d.html
new file mode 100644
index 00000000000..5b5694f544e
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/transforms/individual-transform-2d.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8">
+    <title>Individual transform: combine individual transform properties</title>
+    <link rel="author" title="CJ Ku" href="mailto:cku@mozilla.com">
+    <link rel="author" title="Mozilla" href="https://www.mozilla.org">
+    <link rel="help" href="https://drafts.csswg.org/css-transforms-2/#individual-transforms">
+    <link rel="help" href="https://drafts.csswg.org/css-transforms-2/#ctm">
+    <meta name="assert" content="Tests that we combine transforms in the correct order."/>
+    <link rel="match" href="individual-transform-2-ref.html">
+    <style>
+      div {
+        position: fixed;
+        width: 100px;
+        height: 100px;
+        top: 200px;
+        left: 200px;
+        transform-origin: 0 0;
+        border-style: solid;
+        border-width: 10px 0px 10px 0px;
+        border-color: lime;
+        translate: 50px 50px;
+        transform: rotate(45deg) scale(2, 2);
+      }
+    </style>
+  </head>
+  <body>
+    <div></div>
+  </body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/transforms/individual-transform-2e.html b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/transforms/individual-transform-2e.html
new file mode 100644
index 00000000000..0350137bede
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/transforms/individual-transform-2e.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8">
+    <title>Individual transform: combine individual transform properties</title>
+    <link rel="author" title="CJ Ku" href="mailto:cku@mozilla.com">
+    <link rel="author" title="Mozilla" href="https://www.mozilla.org">
+    <link rel="help" href="https://drafts.csswg.org/css-transforms-2/#individual-transforms">
+    <link rel="help" href="https://drafts.csswg.org/css-transforms-2/#ctm">
+    <meta name="assert" content="Tests that we combine transforms in the correct order."/>
+    <link rel="match" href="individual-transform-2-ref.html">
+    <style>
+      div {
+        position: fixed;
+        width: 100px;
+        height: 100px;
+        top: 200px;
+        left: 200px;
+        transform-origin: 0 0;
+        border-style: solid;
+        border-width: 10px 0px 10px 0px;
+        border-color: lime;
+        translate: 0px 50px;
+        transform: translateX(50px) rotate(45deg) scale(2, 2);
+      }
+    </style>
+  </head>
+  <body>
+    <div></div>
+  </body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/transforms/reftest.list b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/transforms/reftest.list
index 4bc525b0bd4..ef1d7aa77c6 100644
--- a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/transforms/reftest.list
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/transforms/reftest.list
@@ -4,3 +4,12 @@
 == perspective-containing-block-dynamic-1b.html containing-block-dynamic-1-ref.html
 == perspective-zero.html reference/green.html
 == perspective-zero-2.html perspective-zero-2-ref.html
+
+# stylo-vs-gecko comparison fails since we support individual transform on new
+# style system only.
+== individual-transform-1.html individual-transform-1-ref.html
+== individual-transform-2a.html individual-transform-2-ref.html
+== individual-transform-2b.html individual-transform-2-ref.html
+== individual-transform-2c.html individual-transform-2-ref.html
+== individual-transform-2d.html individual-transform-2-ref.html
+== individual-transform-2e.html individual-transform-2-ref.html
diff --git a/tests/wpt/web-platform-tests/custom-elements/Document-createElement.html b/tests/wpt/web-platform-tests/custom-elements/Document-createElement.html
index 52a68e8e178..97a56595502 100644
--- a/tests/wpt/web-platform-tests/custom-elements/Document-createElement.html
+++ b/tests/wpt/web-platform-tests/custom-elements/Document-createElement.html
@@ -342,6 +342,18 @@ test(function () {
 
 }, 'document.createElement must report an exception thrown by a custom element constructor');
 
+test(() => {
+  class MyElement extends HTMLDivElement {}
+
+  // createElement with unknown 'is' should not throw.
+  // https://github.com/w3c/webcomponents/issues/608
+  let div = document.createElement('div', { is: 'my-div' });
+  assert_false(div instanceof MyElement);
+
+  customElements.define('my-div', MyElement, { extends: 'div' });
+  document.body.appendChild(div);
+  assert_true(div instanceof MyElement, 'Undefined element is upgraded on connecting to a document');
+}, 'document.createElement with unknown "is" value should create "undefined" state element');
 </script>
 </body>
 </html>
diff --git a/tests/wpt/web-platform-tests/custom-elements/reactions/CSSStyleDeclaration.html b/tests/wpt/web-platform-tests/custom-elements/reactions/CSSStyleDeclaration.html
index bf9e00ab528..95274d8c757 100644
--- a/tests/wpt/web-platform-tests/custom-elements/reactions/CSSStyleDeclaration.html
+++ b/tests/wpt/web-platform-tests/custom-elements/reactions/CSSStyleDeclaration.html
@@ -26,13 +26,17 @@ test_mutating_style_property_priority(function (instance, propertyName, idlName,
     instance.style.setProperty(propertyName, instance.style[idlName], isImportant ? 'important': '');
 }, 'setProperty on CSSStyleDeclaration');
 
-test_mutating_style_property_value(function (instance, propertyName, idlName, value) {
-    instance.style.setPropertyValue(propertyName, value);
-}, 'setPropertyValue on CSSStyleDeclaration');
+if (CSSStyleDeclaration.prototype.setPropertyValue) {
+    test_mutating_style_property_value(function (instance, propertyName, idlName, value) {
+        instance.style.setPropertyValue(propertyName, value);
+    }, 'setPropertyValue on CSSStyleDeclaration');
+}
 
-test_mutating_style_property_priority(function (instance, propertyName, idlName, isImportant) {
-    instance.style.setPropertyPriority(propertyName, isImportant ? 'important': '');
-}, 'setPropertyPriority on CSSStyleDeclaration');
+if (CSSStyleDeclaration.prototype.setPropertyPriority) {
+    test_mutating_style_property_priority(function (instance, propertyName, idlName, isImportant) {
+        instance.style.setPropertyPriority(propertyName, isImportant ? 'important': '');
+    }, 'setPropertyPriority on CSSStyleDeclaration');
+}
 
 test_removing_style_property_value(function (instance, propertyName, idlName) {
     instance.style.removeProperty(propertyName);
diff --git a/tests/wpt/web-platform-tests/custom-elements/reactions/HTMLElement.html b/tests/wpt/web-platform-tests/custom-elements/reactions/HTMLElement.html
index bce4ef1627c..5fe422cdfc1 100644
--- a/tests/wpt/web-platform-tests/custom-elements/reactions/HTMLElement.html
+++ b/tests/wpt/web-platform-tests/custom-elements/reactions/HTMLElement.html
@@ -22,8 +22,6 @@ testReflectBooleanAttribute('hidden', 'hidden', 'hidden on HTMLElement');
 testReflectAttribute('tabIndex', 'tabindex', '0', '1', 'tabIndex on HTMLElement');
 testReflectAttribute('accessKey', 'accesskey', 'a', 'b', 'accessKey on HTMLElement');
 testReflectAttributeWithContentValues('draggable', 'draggable', true, 'true', false, 'false', 'draggable on HTMLElement');
-testReflectAttribute('dropzone', 'dropzone', 'copy', 'move', 'dropzone on HTMLElement');
-testReflectAttribute('contextMenu', 'contextmenu', 'menu1', 'menu2', 'contextMenu on HTMLElement');
 testReflectAttributeWithContentValues('spellcheck', 'spellcheck', true, 'true', false, 'false', 'spellcheck on HTMLElement');
 
 testNodeDisconnector(function (customElement) {
diff --git a/tests/wpt/web-platform-tests/custom-elements/reactions/HTMLInputElement.html b/tests/wpt/web-platform-tests/custom-elements/reactions/HTMLInputElement.html
index 8193d2c57f7..dc4b22a22ee 100644
--- a/tests/wpt/web-platform-tests/custom-elements/reactions/HTMLInputElement.html
+++ b/tests/wpt/web-platform-tests/custom-elements/reactions/HTMLInputElement.html
@@ -11,51 +11,56 @@
 <script src="./resources/reactions.js"></script>
 <body>
 <script>
-test(() => {
-    const element = define_build_in_custom_element(['capture'], HTMLInputElement, 'input');
-    const instance = document.createElement('input', { is: element.name });
+if (HTMLInputElement.prototype.capture) {
+    test(() => {
+        const element = define_build_in_custom_element(['capture'], HTMLInputElement, 'input');
+        const instance = document.createElement('input', { is: element.name });
 
-    assert_array_equals(element.takeLog().types(), ['constructed']);
-    instance['capture'] = 'user';
-    const logEntries = element.takeLog();
-    assert_array_equals(logEntries.types(), ['attributeChanged']);
-    assert_attribute_log_entry(logEntries.last(), {name: 'capture', oldValue: '', newValue: 'user', namespace: null});
-}, 'capture on HTMLInputElement must enqueue an attributeChanged reaction when adding new attribute');
+        assert_array_equals(element.takeLog().types(), ['constructed']);
+        instance['capture'] = 'user';
+        const logEntries = element.takeLog();
+        assert_array_equals(logEntries.types(), ['attributeChanged']);
+        assert_attribute_log_entry(logEntries.last(), {name: 'capture', oldValue: '', newValue: 'user', namespace: null});
+    }, 'capture on HTMLInputElement must enqueue an attributeChanged reaction when adding new attribute');
 
-test(() => {
-    const element = define_build_in_custom_element(['capture'], HTMLInputElement, 'input');
-    const instance = document.createElement('input', { is: element.name });
+    test(() => {
+        const element = define_build_in_custom_element(['capture'], HTMLInputElement, 'input');
+        const instance = document.createElement('input', { is: element.name });
 
-    instance['capture'] = 'user';
-    assert_array_equals(element.takeLog().types(), ['constructed', 'attributeChanged']);
-    instance['capture'] = 'environment';
-    const logEntries = element.takeLog();
-    assert_array_equals(logEntries.types(), ['attributeChanged']);
-    assert_attribute_log_entry(logEntries.last(), {name: 'capture', oldValue: 'user', newValue: 'environment', namespace: null});
-}, 'capture on HTMLInputElement must enqueue an attributeChanged reaction when replacing an existing attribute');
+        instance['capture'] = 'user';
+        assert_array_equals(element.takeLog().types(), ['constructed', 'attributeChanged']);
+        instance['capture'] = 'environment';
+        const logEntries = element.takeLog();
+        assert_array_equals(logEntries.types(), ['attributeChanged']);
+        assert_attribute_log_entry(logEntries.last(), {name: 'capture', oldValue: 'user', newValue: 'environment', namespace: null});
+    }, 'capture on HTMLInputElement must enqueue an attributeChanged reaction when replacing an existing attribute');
 
-test(() => {
-    const element = define_build_in_custom_element(['capture'], HTMLInputElement, 'input');
-    const instance = document.createElement('input', { is: element.name });
+    test(() => {
+        const element = define_build_in_custom_element(['capture'], HTMLInputElement, 'input');
+        const instance = document.createElement('input', { is: element.name });
 
-    assert_array_equals(element.takeLog().types(), ['constructed']);
-    instance['capture'] = 'asdf';
-    const logEntries = element.takeLog();
-    assert_array_equals(logEntries.types(), ['attributeChanged']);
-    assert_attribute_log_entry(logEntries.last(), {name: 'capture', oldValue: '', newValue: 'asdf', namespace: null});
-}, 'capture on HTMLInputElement must enqueue an attributeChanged reaction when adding invalid value default');
+        assert_array_equals(element.takeLog().types(), ['constructed']);
+        instance['capture'] = 'asdf';
+        const logEntries = element.takeLog();
+        assert_array_equals(logEntries.types(), ['attributeChanged']);
+        assert_attribute_log_entry(logEntries.last(), {name: 'capture', oldValue: '', newValue: 'asdf', namespace: null});
+    }, 'capture on HTMLInputElement must enqueue an attributeChanged reaction when adding invalid value default');
 
+    test(() => {
+        const element = define_build_in_custom_element(['capture'], HTMLInputElement, 'input');
+        const instance = document.createElement('input', { is: element.name });
 
-test(() => {
-    const element = define_build_in_custom_element(['capture'], HTMLInputElement, 'input');
-    const instance = document.createElement('input', { is: element.name });
-
-    instance['capture'] = 'user';
-    assert_array_equals(element.takeLog().types(), ['constructed', 'attributeChanged']);
-    instance['capture'] = '';
-    const logEntries = element.takeLog();
-    assert_array_equals(logEntries.types(), ['attributeChanged']);
-    assert_attribute_log_entry(logEntries.last(), {name: 'capture', oldValue: 'user', newValue: '', namespace: null});
-}, 'capture on HTMLInputElement must enqueue an attributeChanged reaction when removing the attribute');
+        instance['capture'] = 'user';
+        assert_array_equals(element.takeLog().types(), ['constructed', 'attributeChanged']);
+        instance['capture'] = '';
+        const logEntries = element.takeLog();
+        assert_array_equals(logEntries.types(), ['attributeChanged']);
+        assert_attribute_log_entry(logEntries.last(), {name: 'capture', oldValue: 'user', newValue: '', namespace: null});
+    }, 'capture on HTMLInputElement must enqueue an attributeChanged reaction when removing the attribute');
+} else {
+    // testharness.js doesn't allow a test file with no tests.
+    test(() => {
+    }, 'No tests if HTMLInputEement has no "capture" IDL attribute');
+}
 </script>
 </body>
diff --git a/tests/wpt/web-platform-tests/docs/_running-tests/chrome_android.md b/tests/wpt/web-platform-tests/docs/_running-tests/chrome_android.md
index f707995033d..62a2028eb4e 100644
--- a/tests/wpt/web-platform-tests/docs/_running-tests/chrome_android.md
+++ b/tests/wpt/web-platform-tests/docs/_running-tests/chrome_android.md
@@ -1,6 +1,10 @@
 To run WPT on Chrome on an android device, some additional set up is required.
-First until we find a better way, we need to root the android device and update
-the /etc/hosts file to include
+
+First of all, as usual Android development, we need to have `adb` and be able to
+connect to the device.
+
+Furthermore, until we find a better way, we need to root the android device and
+update the /etc/hosts file to include
 
 ```
 127.0.0.1   web-platform.test
@@ -12,22 +16,6 @@ the /etc/hosts file to include
 0.0.0.0     nonexistent-origin.web-platform.test
 ```
 
-Next, we need to start adb and reverse forward the web-platform.tests ports
-
-```
-adb start-server
-```
-
-Add any ports that you need based on your config. For example:
-```
-adb reverse tcp:8000 tcp:8000
-adb reverse tcp:8001 tcp:8001
-adb reverse tcp:8081 tcp:8081
-adb reverse tcp:8444 tcp:8444
-adb reverse tcp:9001 tcp:9001
-adb reverse tcp:9444 tcp:9444
-```
-
 After this, we may run wpt with the `chrome_android` product
 
 ```
diff --git a/tests/wpt/web-platform-tests/html/semantics/forms/the-input-element/image-click-form-data.html b/tests/wpt/web-platform-tests/html/semantics/forms/the-input-element/image-click-form-data.html
new file mode 100644
index 00000000000..87b77e4805d
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/semantics/forms/the-input-element/image-click-form-data.html
@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Check form-data for image submit button with non-empty 'value' attribute</title>
+<link rel="author" title="Shanmuga Pandi" href="mailto:shanmuga.m@samsung.com">
+<link rel="help" href="https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#constructing-form-data-set">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+
+<body>
+<script>
+"use strict";
+
+// promise_test instead of async_test because this test use window.success, and so can't run at the same time.
+
+promise_test(t => {
+  return new Promise(resolve => {
+    window.success = t.step_func(locationLoaded => {
+      const expected = (new URL("resources/image-submit-click.html?name.x=0&name.y=0", location.href)).href;
+      assert_equals(locationLoaded, expected);
+      resolve();
+    });
+
+    const iframe = document.createElement("iframe");
+    iframe.src = "resources/image-submit-click.html";
+    document.body.appendChild(iframe);
+  });
+}, "Image submit button should not add extra form data if 'value' attribute is present with non-empty value");
+</script>
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/html/semantics/forms/the-input-element/resources/image-submit-click.html b/tests/wpt/web-platform-tests/html/semantics/forms/the-input-element/resources/image-submit-click.html
new file mode 100644
index 00000000000..8461a03d7a5
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/semantics/forms/the-input-element/resources/image-submit-click.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<form>
+  <input type="image" name="name" value="value">
+</form>
+
+<script>
+"use strict";
+if (window.location.search.startsWith("?name.x")) {
+  // The action pointed to ourself, so the form submitted something
+  window.parent.success(window.location.href);
+} else {
+  const input = document.querySelector("input");
+  input.click();
+}
+</script>
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/html/webappapis/scripting/processing-model-2/unhandled-promise-rejections/promise-rejection-event-constructor.html b/tests/wpt/web-platform-tests/html/webappapis/scripting/processing-model-2/unhandled-promise-rejections/promise-rejection-event-constructor.html
index 109b10ead44..17cc35c21b0 100644
--- a/tests/wpt/web-platform-tests/html/webappapis/scripting/processing-model-2/unhandled-promise-rejections/promise-rejection-event-constructor.html
+++ b/tests/wpt/web-platform-tests/html/webappapis/scripting/processing-model-2/unhandled-promise-rejections/promise-rejection-event-constructor.html
@@ -33,7 +33,7 @@ test(function() {
   // reason is passed.
   var r = new Error();
   assert_equals(new PromiseRejectionEvent('eventType', { promise: p, reason: r }).reason, r);
-
+  assert_equals(new PromiseRejectionEvent('eventType', { promise: p, reason: null }).reason, null);
 
   // All initializers are passed.
   assert_equals(new PromiseRejectionEvent('eventType', { bubbles: true, cancelable: true, promise: p, reason: r }).bubbles, true);
diff --git a/tests/wpt/web-platform-tests/interfaces/css-typed-om.idl b/tests/wpt/web-platform-tests/interfaces/css-typed-om.idl
new file mode 100644
index 00000000000..64df3c16139
--- /dev/null
+++ b/tests/wpt/web-platform-tests/interfaces/css-typed-om.idl
@@ -0,0 +1,338 @@
+[Exposed=(Window, Worker, PaintWorklet, LayoutWorklet)]
+interface CSSStyleValue {
+    stringifier;
+    [Exposed=Window] static CSSStyleValue parse(DOMString property, DOMString cssText);
+    [Exposed=Window] static sequence<CSSStyleValue> parseAll(DOMString property, DOMString cssText);
+};
+
+[Exposed=(Window, Worker, PaintWorklet, LayoutWorklet)]
+interface StylePropertyMapReadOnly {
+    readonly maplike<DOMString, sequence<CSSStyleValue>>;
+    any get(DOMString property);
+    /* 'any' means (undefined or CSSStyleValue) here,
+       see https://github.com/heycam/webidl/issues/60 */
+    sequence<CSSStyleValue> getAll(DOMString property);
+    boolean has(DOMString property);
+    stringifier;
+};
+
+callback UpdateFunction = CSSStyleValue (CSSStyleValue oldValue);
+
+[Exposed=Window]
+interface StylePropertyMap : StylePropertyMapReadOnly {
+    maplike<DOMString, sequence<CSSStyleValue>>;
+    void append(DOMString property, (CSSStyleValue or DOMString)... values);
+    void delete(DOMString property);
+    void set(DOMString property, (CSSStyleValue or DOMString)... values);
+    void update(DOMString property, UpdateFunction updateFunction);
+};
+
+[Exposed=(Window, Worker, PaintWorklet, LayoutWorklet)]
+partial interface Element {
+    StylePropertyMapReadOnly computedStyleMap();
+};
+
+[Exposed=(Window, Worker, PaintWorklet, LayoutWorklet)]
+partial interface CSSStyleRule {
+    [SameObject] readonly attribute StylePropertyMap styleMap;
+};
+
+[Exposed=(Window, Worker, PaintWorklet, LayoutWorklet)]
+partial interface ElementCSSInlineStyle {
+    [SameObject] readonly attribute StylePropertyMap attributeStyleMap;
+};
+
+[Exposed=(Window, Worker, PaintWorklet, LayoutWorklet),
+ Constructor(sequence<CSSUnparsedSegment> members)]
+interface CSSUnparsedValue : CSSStyleValue {
+    iterable<CSSUnparsedSegment>;
+    readonly attribute unsigned long length;
+    getter CSSUnparsedSegment (unsigned long index);
+    setter CSSUnparsedSegment (unsigned long index, CSSUnparsedSegment val);
+};
+
+typedef (DOMString or CSSVariableReferenceValue) CSSUnparsedSegment;
+
+[Exposed=(Window, Worker, PaintWorklet, LayoutWorklet),
+ Constructor(DOMString variable, optional CSSUnparsedValue fallback)]
+interface CSSVariableReferenceValue {
+    attribute DOMString variable;
+    readonly attribute CSSUnparsedValue? fallback;
+};
+
+[Exposed=(Window, Worker, PaintWorklet, LayoutWorklet),
+ Constructor(DOMString value)]
+interface CSSKeywordValue : CSSStyleValue {
+    attribute DOMString value;
+};
+
+typedef (DOMString or CSSKeywordValue) CSSKeywordish;
+
+typedef (double or CSSNumericValue) CSSNumberish;
+
+enum CSSNumericBaseType {
+    "length",
+    "angle",
+    "time",
+    "frequency",
+    "resolution",
+    "flex",
+    "percent",
+};
+
+dictionary CSSNumericType {
+    long length;
+    long angle;
+    long time;
+    long frequency;
+    long resolution;
+    long flex;
+    long percent;
+    CSSNumericBaseType percentHint;
+};
+
+[Exposed=(Window, Worker, PaintWorklet, LayoutWorklet)]
+interface CSSNumericValue : CSSStyleValue {
+    CSSNumericValue add(CSSNumberish... values);
+    CSSNumericValue sub(CSSNumberish... values);
+    CSSNumericValue mul(CSSNumberish... values);
+    CSSNumericValue div(CSSNumberish... values);
+    CSSNumericValue min(CSSNumberish... values);
+    CSSNumericValue max(CSSNumberish... values);
+
+    boolean equals(CSSNumberish... value);
+
+    CSSUnitValue to(DOMString unit);
+    CSSMathSum toSum(DOMString... units);
+    CSSNumericType type();
+
+    [Exposed=Window] static CSSNumericValue parse(DOMString cssText);
+};
+
+[Exposed=(Window, Worker, PaintWorklet, LayoutWorklet),
+ Constructor(double value, DOMString unit)]
+interface CSSUnitValue : CSSNumericValue {
+    attribute double value;
+    readonly attribute DOMString unit;
+};
+
+[Exposed=(Window, Worker, PaintWorklet, LayoutWorklet)]
+interface CSSMathValue : CSSNumericValue {
+    readonly attribute CSSMathOperator operator;
+};
+
+[Exposed=(Window, Worker, PaintWorklet, LayoutWorklet),
+ Constructor(CSSNumberish... args)]
+interface CSSMathSum : CSSMathValue {
+    readonly attribute CSSNumericArray values;
+};
+
+[Exposed=(Window, Worker, PaintWorklet, LayoutWorklet),
+ Constructor(CSSNumberish... args)]
+interface CSSMathProduct : CSSMathValue {
+    readonly attribute CSSNumericArray values;
+};
+
+[Exposed=(Window, Worker, PaintWorklet, LayoutWorklet),
+ Constructor(CSSNumberish arg)]
+interface CSSMathNegate : CSSMathValue {
+    readonly attribute CSSNumericValue value;
+};
+
+[Exposed=(Window, Worker, PaintWorklet, LayoutWorklet),
+ Constructor(CSSNumberish arg)]
+interface CSSMathInvert : CSSMathValue {
+    readonly attribute CSSNumericValue value;
+};
+
+[Exposed=(Window, Worker, PaintWorklet, LayoutWorklet),
+ Constructor(CSSNumberish... args)]
+interface CSSMathMin : CSSMathValue {
+    readonly attribute CSSNumericArray values;
+};
+
+[Exposed=(Window, Worker, PaintWorklet, LayoutWorklet),
+ Constructor(CSSNumberish... args)]
+interface CSSMathMax : CSSMathValue {
+    readonly attribute CSSNumericArray values;
+};
+
+[Exposed=(Window, Worker, PaintWorklet, LayoutWorklet)]
+interface CSSNumericArray {
+    iterable<CSSNumericValue>;
+    readonly attribute unsigned long length;
+    getter CSSNumericValue (unsigned long index);
+};
+
+enum CSSMathOperator {
+    "sum",
+    "product",
+    "negate",
+    "invert",
+    "min",
+    "max",
+};
+
+// FIXME: Uncomment this when IDLHarness supports CSS namespaces:
+// https://github.com/w3c/web-platform-tests/issues/7583
+/*
+partial namespace CSS {
+    CSSUnitValue number(double value);
+    CSSUnitValue percent(double value);
+
+    // <length>
+    CSSUnitValue em(double value);
+    CSSUnitValue ex(double value);
+    CSSUnitValue ch(double value);
+    CSSUnitValue ic(double value);
+    CSSUnitValue rem(double value);
+    CSSUnitValue lh(double value);
+    CSSUnitValue rlh(double value);
+    CSSUnitValue vw(double value);
+    CSSUnitValue vh(double value);
+    CSSUnitValue vi(double value);
+    CSSUnitValue vb(double value);
+    CSSUnitValue vmin(double value);
+    CSSUnitValue vmax(double value);
+    CSSUnitValue cm(double value);
+    CSSUnitValue mm(double value);
+    CSSUnitValue Q(double value);
+    CSSUnitValue in(double value);
+    CSSUnitValue pt(double value);
+    CSSUnitValue pc(double value);
+    CSSUnitValue px(double value);
+
+    // <angle>
+    CSSUnitValue deg(double value);
+    CSSUnitValue grad(double value);
+    CSSUnitValue rad(double value);
+    CSSUnitValue turn(double value);
+
+    // <time>
+    CSSUnitValue s(double value);
+    CSSUnitValue ms(double value);
+
+    // <frequency>
+    CSSUnitValue Hz(double value);
+    CSSUnitValue kHz(double value);
+
+    // <resolution>
+    CSSUnitValue dpi(double value);
+    CSSUnitValue dpcm(double value);
+    CSSUnitValue dppx(double value);
+
+    // <flex>
+    CSSUnitValue fr(double value);
+};
+*/
+
+[Exposed=(Window, Worker, PaintWorklet, LayoutWorklet),
+ Constructor(sequence<CSSTransformComponent> transforms)]
+interface CSSTransformValue : CSSStyleValue {
+    iterable<CSSTransformComponent>;
+    readonly attribute unsigned long length;
+    getter CSSTransformComponent (unsigned long index);
+    setter CSSTransformComponent (unsigned long index, CSSTransformComponent val);
+
+    readonly attribute boolean is2D;
+    DOMMatrix toMatrix();
+};
+
+[Exposed=(Window, Worker, PaintWorklet, LayoutWorklet)]
+interface CSSTransformComponent {
+    stringifier;
+    attribute boolean is2D;
+    DOMMatrix toMatrix();
+};
+
+[Exposed=(Window, Worker, PaintWorklet, LayoutWorklet),
+ Constructor(CSSNumericValue x, CSSNumericValue y, optional CSSNumericValue z)]
+interface CSSTranslate : CSSTransformComponent {
+    attribute CSSNumericValue x;
+    attribute CSSNumericValue y;
+    attribute CSSNumericValue z;
+};
+
+[Exposed=(Window, Worker, PaintWorklet, LayoutWorklet),
+ Constructor(CSSNumericValue angle),
+ Constructor(CSSNumberish x, CSSNumberish y, CSSNumberish z, CSSNumericValue angle)]
+interface CSSRotate : CSSTransformComponent {
+    attribute CSSNumberish x;
+    attribute CSSNumberish y;
+    attribute CSSNumberish z;
+    attribute CSSNumericValue angle;
+};
+
+[Exposed=(Window, Worker, PaintWorklet, LayoutWorklet),
+ Constructor(CSSNumberish x, CSSNumberish y, optional CSSNumberish z)]
+interface CSSScale : CSSTransformComponent {
+    attribute CSSNumberish x;
+    attribute CSSNumberish y;
+    attribute CSSNumberish z;
+};
+
+[Exposed=(Window, Worker, PaintWorklet, LayoutWorklet),
+ Constructor(CSSNumericValue ax, CSSNumericValue ay)]
+interface CSSSkew : CSSTransformComponent {
+    attribute CSSNumericValue ax;
+    attribute CSSNumericValue ay;
+};
+
+[Exposed=(Window, Worker, PaintWorklet, LayoutWorklet),
+ Constructor(CSSNumericValue ax)]
+interface CSSSkewX : CSSTransformComponent {
+    attribute CSSNumericValue ax;
+};
+
+[Exposed=(Window, Worker, PaintWorklet, LayoutWorklet),
+ Constructor(CSSNumericValue ay)]
+interface CSSSkewY : CSSTransformComponent {
+    attribute CSSNumericValue ay;
+};
+
+/* Note that skew(x,y) is *not* the same as skewX(x) skewY(y),
+   thus the separate interfaces for all three. */
+
+[Exposed=(Window, Worker, PaintWorklet, LayoutWorklet),
+ Constructor(CSSNumericValue length)]
+interface CSSPerspective : CSSTransformComponent {
+    attribute CSSNumericValue length;
+};
+
+[Exposed=(Window, Worker, PaintWorklet, LayoutWorklet),
+ Constructor(DOMMatrixReadOnly matrix, optional CSSMatrixComponentOptions options)]
+interface CSSMatrixComponent : CSSTransformComponent {
+    attribute DOMMatrix matrix;
+};
+
+dictionary CSSMatrixComponentOptions {
+    boolean is2D = false;
+};
+
+[Exposed=(Window, Worker, PaintWorklet, LayoutWorklet),
+ Constructor(CSSNumericValue x, CSSNumericValue y)]
+interface CSSPositionValue : CSSStyleValue {
+    attribute CSSNumericValue x;
+    attribute CSSNumericValue y;
+};
+
+enum CSSResourceState {"unloaded", "loading", "loaded", "error"};
+
+[Exposed=(Window, Worker, PaintWorklet, LayoutWorklet)]
+interface CSSResourceValue : CSSStyleValue {
+    readonly attribute CSSResourceState state;
+};
+
+
+[Exposed=(Window, Worker, PaintWorklet, LayoutWorklet)]
+interface CSSImageValue : CSSResourceValue {
+    readonly attribute double? intrinsicWidth;
+    readonly attribute double? intrinsicHeight;
+    readonly attribute double? intrinsicRatio;
+};
+
+[Exposed=(Window, Worker, PaintWorklet, LayoutWorklet),
+ Constructor(USVString url)]
+interface CSSURLImageValue : CSSImageValue {
+    readonly attribute USVString url;
+};
diff --git a/tests/wpt/web-platform-tests/media-source/mediasource-endofstream.html b/tests/wpt/web-platform-tests/media-source/mediasource-endofstream.html
index bca80af8162..5b6114fa716 100644
--- a/tests/wpt/web-platform-tests/media-source/mediasource-endofstream.html
+++ b/tests/wpt/web-platform-tests/media-source/mediasource-endofstream.html
@@ -52,7 +52,8 @@
             // Note that segmentInfo.duration is expected to also be the
             // highest track buffer range end time. Therefore, endOfStream() should
             // not change duration with this media.
-            assert_equals(threeDecimalPlaces(segmentInfo.duration), threeDecimalPlaces(mediaSource.duration));
+            assert_equals(threeDecimalPlaces(segmentInfo.duration), threeDecimalPlaces(mediaSource.duration),
+                'SegmentInfo duration should initially roughly match mediaSource duration');
             assert_less_than_equal(highestEndTime, mediaSource.duration,
                 'Media duration may be slightly longer than intersected track buffered ranges');
 
@@ -64,7 +65,8 @@
             assert_equals(sourceBuffer.buffered.length, 1,
               'Media data properly buffered after endOfStream');
 
-            assert_equals(threeDecimalPlaces(segmentInfo.duration), threeDecimalPlaces(mediaSource.duration));
+            assert_equals(threeDecimalPlaces(segmentInfo.duration), threeDecimalPlaces(mediaSource.duration),
+                'SegmentInfo duration should still roughly match mediaSource duration');
             assert_less_than_equal(highestEndTime, mediaSource.duration,
                 'Media duration may be slightly longer than intersected track buffered ranges');
             assert_equals(sourceBuffer.buffered.end(0), mediaSource.duration,
diff --git a/tests/wpt/web-platform-tests/picture-in-picture/disable-picture-in-picture.html b/tests/wpt/web-platform-tests/picture-in-picture/disable-picture-in-picture.html
new file mode 100644
index 00000000000..8726d1aaf88
--- /dev/null
+++ b/tests/wpt/web-platform-tests/picture-in-picture/disable-picture-in-picture.html
@@ -0,0 +1,61 @@
+<!DOCTYPE html>
+<title>Test disable Picture-in-Picture</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<script src="resources/picture-in-picture-helpers.js"></script>
+<body></body>
+<script>
+test(t => {
+  const video = document.createElement('video');
+  assert_false(video.disablePictureInPicture); // default value
+
+  video.setAttribute('disablepictureinpicture', 'foo');
+  assert_true(video.disablePictureInPicture);
+
+  video.removeAttribute('disablepictureinpicture');
+  assert_false(video.disablePictureInPicture);
+
+  video.disablePictureInPicture = true;
+  assert_equals(video.getAttribute('disablepictureinpicture'), '');
+
+  video.disablePictureInPicture = false;
+  assert_equals(video.getAttribute('disablepictureinpicture'), null);
+}, 'Test disablePictureInPicture IDL attribute');
+
+promise_test(t => {
+  const video = document.createElement('video');
+  video.disablePictureInPicture = true;
+  return promise_rejects(t, 'InvalidStateError',
+      requestPictureInPictureWithTrustedClick(video));
+}, 'Request Picture-in-Picture rejects if disablePictureInPicture is true');
+
+promise_test(t => {
+  const video = document.createElement('video');
+  return requestPictureInPictureWithTrustedClick(video)
+  .then(() => {
+    video.disablePictureInPicture = true;
+    assert_equals(document.pictureInPictureElement, null);
+  });
+}, 'pictureInPictureElement is unset if disablePictureInPicture becomes true');
+
+promise_test(t => {
+  const video = document.createElement('video');
+  return requestPictureInPictureWithTrustedClick(video)
+  .then(() => {
+    video.disablePictureInPicture = false;
+    assert_equals(document.pictureInPictureElement, video);
+  });
+}, 'pictureInPictureElement is unchanged if disablePictureInPicture becomes false');
+
+promise_test(t => {
+  const video = document.createElement('video');
+  return requestPictureInPictureWithTrustedClick(video)
+  .then(() => {
+    document.createElement('video').disablePictureInPicture = true;
+    assert_equals(document.pictureInPictureElement, video);
+  });
+}, 'pictureInPictureElement is unchanged if disablePictureInPicture becomes ' +
+   'true for another video');
+</script>
diff --git a/tests/wpt/web-platform-tests/picture-in-picture/enter-picture-in-picture.html b/tests/wpt/web-platform-tests/picture-in-picture/enter-picture-in-picture.html
new file mode 100644
index 00000000000..e44087c3ff1
--- /dev/null
+++ b/tests/wpt/web-platform-tests/picture-in-picture/enter-picture-in-picture.html
@@ -0,0 +1,23 @@
+<!DOCTYPE html>
+<title>Test enterpictureinpicture event</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<script src="resources/picture-in-picture-helpers.js"></script>
+<body></body>
+<script>
+async_test(t => {
+  const video = document.createElement('video');
+
+  video.addEventListener('enterpictureinpicture', t.step_func_done(event => {
+    assert_equals(event.target, video);
+    assert_equals(event.bubbles, true);
+    assert_equals(event.cancelable, false);
+    assert_equals(event.composed, false);
+    assert_equals(document.pictureInPictureElement, video);
+  }));
+
+  return requestPictureInPictureWithTrustedClick(video);
+});
+</script>
diff --git a/tests/wpt/web-platform-tests/picture-in-picture/exit-picture-in-picture.html b/tests/wpt/web-platform-tests/picture-in-picture/exit-picture-in-picture.html
new file mode 100644
index 00000000000..e0ab7acd8f9
--- /dev/null
+++ b/tests/wpt/web-platform-tests/picture-in-picture/exit-picture-in-picture.html
@@ -0,0 +1,20 @@
+<!DOCTYPE html>
+<title>Test exit Picture-in-Picture</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<script src="resources/picture-in-picture-helpers.js"></script>
+<body></body>
+<script>
+promise_test(t => {
+  return requestPictureInPictureWithTrustedClick(document.createElement('video'))
+  .then(() => document.exitPictureInPicture());
+}, 'Exit Picture-in-Picture resolves when there is a Picture-in-Picture video');
+
+
+promise_test(t => {
+  return promise_rejects(t, 'InvalidStateError',
+      document.exitPictureInPicture());
+}, 'Exit Picture-in-Picture rejects when there is no Picture-in-Picture video');
+</script>
diff --git a/tests/wpt/web-platform-tests/picture-in-picture/not-processing-user-gesture.html b/tests/wpt/web-platform-tests/picture-in-picture/not-processing-user-gesture.html
new file mode 100644
index 00000000000..00758946b80
--- /dev/null
+++ b/tests/wpt/web-platform-tests/picture-in-picture/not-processing-user-gesture.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<title>Test request Picture-in-Picture requires a user gesture</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<body></body>
+<script>
+promise_test(t => {
+  return promise_rejects(t, 'NotAllowedError',
+      document.createElement('video').requestPictureInPicture());
+}, );
+</script>
diff --git a/tests/wpt/web-platform-tests/picture-in-picture/picture-in-picture-element.html b/tests/wpt/web-platform-tests/picture-in-picture/picture-in-picture-element.html
new file mode 100644
index 00000000000..71e39961816
--- /dev/null
+++ b/tests/wpt/web-platform-tests/picture-in-picture/picture-in-picture-element.html
@@ -0,0 +1,23 @@
+<!DOCTYPE html>
+<title>Test Picture-in-Picture element</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<script src="resources/picture-in-picture-helpers.js"></script>
+<body></body>
+<script>
+promise_test(t => {
+  assert_equals(document.pictureInPictureElement, null);
+  const video = document.createElement('video');
+
+  return requestPictureInPictureWithTrustedClick(video)
+  .then(() => {
+    assert_equals(document.pictureInPictureElement, video);
+    return document.exitPictureInPicture();
+  })
+  .then(() => {
+    assert_equals(document.pictureInPictureElement, null);
+  })
+});
+</script>
diff --git a/tests/wpt/web-platform-tests/picture-in-picture/request-picture-in-picture.html b/tests/wpt/web-platform-tests/picture-in-picture/request-picture-in-picture.html
new file mode 100644
index 00000000000..eaabcb7a205
--- /dev/null
+++ b/tests/wpt/web-platform-tests/picture-in-picture/request-picture-in-picture.html
@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<title>Test request Picture-in-Picture</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<script src="resources/picture-in-picture-helpers.js"></script>
+<body></body>
+<script>
+promise_test(t => {
+  return requestPictureInPictureWithTrustedClick(document.createElement('video'));
+});
+</script>
diff --git a/tests/wpt/web-platform-tests/picture-in-picture/resources/picture-in-picture-helpers.js b/tests/wpt/web-platform-tests/picture-in-picture/resources/picture-in-picture-helpers.js
new file mode 100644
index 00000000000..0808a991a26
--- /dev/null
+++ b/tests/wpt/web-platform-tests/picture-in-picture/resources/picture-in-picture-helpers.js
@@ -0,0 +1,21 @@
+function callWithTrustedClick(callback) {
+  return new Promise(resolve => {
+    let button = document.createElement('button');
+    button.textContent = 'click to continue test';
+    button.style.display = 'block';
+    button.style.fontSize = '20px';
+    button.style.padding = '10px';
+    button.onclick = () => {
+      document.body.removeChild(button);
+      resolve(callback());
+    };
+    document.body.appendChild(button);
+    test_driver.click(button);
+  });
+}
+
+// Calls requestPictureInPicture() in a context that's 'allowed to request PiP'.
+function requestPictureInPictureWithTrustedClick(videoElement) {
+  return callWithTrustedClick(
+      () => videoElement.requestPictureInPicture());
+}
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/resource-timing/resource_TAO_origin.htm b/tests/wpt/web-platform-tests/resource-timing/resource_TAO_origin.htm
index dc5efa43ee2..a0c0465e726 100644
--- a/tests/wpt/web-platform-tests/resource-timing/resource_TAO_origin.htm
+++ b/tests/wpt/web-platform-tests/resource-timing/resource_TAO_origin.htm
@@ -12,19 +12,12 @@
 <script>
 setup({explicit_done: true});
 
-// explicitly test the namespace before we start testing
-test_namespace("getEntriesByType");
-
-var d;
-var iframe;
-var iframeBody;
-var image;
-var random = Math.random();
+// Explicitly test the namespace before we start testing.
+test_namespace('getEntriesByType');
 
+let iframe;
 function setup_iframe() {
     iframe = document.getElementById('frameContext');
-    d = iframe.contentWindow.document;
-    iframeBody = d.body;
     iframe.addEventListener('load', onload_test, false);
 }
 function onload_test() {
@@ -32,15 +25,22 @@ function onload_test() {
       done();
       return;
     }
-    var context = new PerformanceContext(iframe.contentWindow.performance);
-    var entries = context.getEntriesByType('resource');
-
-    if(entries.length > 0) {
-        entry = entries[0];
-
-        test_not_equals((entry.redirectStart + entry.redirectEnd + entry.domainLookupStart + entry.domainLookupEnd + entry.connectStart + entry.connectEnd + entry.secureConnectionStart + entry.requestStart + entry.responseStart), 0, 'redirectStart, redirectEnd, domainLookupStart, domainLookupEnd, connectStart, connectEnd, secureConnectionStart, requestStart, and responseStart -- should NOT be all returned as 0 when the value of Timing-Allow-Origin is a case-sensitive match for the value of the origin of the current document and TAO algorithm passes');
-    }
+    const context = new PerformanceContext(iframe.contentWindow.performance);
+    const entries = context.getEntriesByType('resource');
 
+    test_equals(entries.length, 1, 'The iframe should have one resource timing entry.');
+    const entry = entries[0];
+    test_equals(entry.redirectStart, 0, 'redirectStart should be 0 in cross-origin request since no redirect.');
+    test_equals(entry.redirectEnd, 0, 'redirectEnd should be 0 in cross-origin request since no redirect.');
+    test_greater_than(entry.domainLookupStart, 0, 'domainLookupStart should not be 0 in timing-allow cross-origin request.');
+    test_greater_than(entry.domainLookupEnd, 0, 'domainLookupEnd should not be 0 in timing-allow cross-origin request.');
+    test_greater_than(entry.connectStart, 0, 'connectStart should not be 0 in timing-allow cross-origin request.');
+    test_greater_than(entry.connectEnd, 0, 'connectEnd should not be 0 in timing-allow cross-origin request.');
+    test_greater_than(entry.requestStart, 0, 'requestStart should not be 0 in timing-allow cross-origin request.');
+    test_greater_than(entry.responseStart, 0, 'responseStart should not be 0 in timing-allow cross-origin request.');
+    test_equals(entry.secureConnectionStart, 0, 'secureConnectionStart should be 0 in cross-origin request since no ssl!');
+    test_greater_than(entry.fetchStart, 0, 'fetchStart should not be 0 in timing-allow cross-origin request.');
+    test_greater_than(entry.responseEnd, 0, 'responseEnd should not be 0 in timing-allow cross-origin request.');
     done();
 }
 window.setup_iframe = setup_iframe;
diff --git a/tests/wpt/web-platform-tests/resource-timing/resource_TAO_zero.htm b/tests/wpt/web-platform-tests/resource-timing/resource_TAO_zero.htm
index 0fe16c082a0..a15f54d0134 100644
--- a/tests/wpt/web-platform-tests/resource-timing/resource_TAO_zero.htm
+++ b/tests/wpt/web-platform-tests/resource-timing/resource_TAO_zero.htm
@@ -13,18 +13,11 @@
 setup({explicit_done: true});
 
 // explicitly test the namespace before we start testing
-test_namespace("getEntriesByType");
-
-var d;
-var iframe;
-var iframeBody;
-var image;
-var random = Math.random();
+test_namespace('getEntriesByType');
 
+let iframe;
 function setup_iframe() {
     iframe = document.getElementById('frameContext');
-    d = iframe.contentWindow.document;
-    iframeBody = d.body;
     iframe.addEventListener('load', onload_test, false);
 }
 function onload_test() {
@@ -32,15 +25,21 @@ function onload_test() {
       done();
       return;
     }
-    var context = new PerformanceContext(iframe.contentWindow.performance);
-    var entries = context.getEntriesByType('resource');
-
-    if(entries.length > 0) {
-        entry = entries[0];
-
-        test_equals((entry.redirectStart + entry.redirectEnd + entry.domainLookupStart + entry.domainLookupEnd + entry.connectStart + entry.connectEnd + entry.secureConnectionStart + entry.requestStart + entry.responseStart), 0, "redirectStart, redirectEnd, domainLookupStart, domainLookupEnd, connectStart, connectEnd, secureConnectionStart, requestStart, and responseStart -- should be all returned as 0 when the HTTP response includes zero Timing-Allow-Origin header value and TAO algorithm fails");
-    }
-
+    const context = new PerformanceContext(iframe.contentWindow.performance);
+    const entries = context.getEntriesByType('resource');
+    test_equals(entries.length, 1, 'There should be one resource timing entry.');
+    const entry = entries[0];
+    test_equals(entry.redirectStart, 0, 'redirectStart should be 0 in cross-origin request.');
+    test_equals(entry.redirectEnd, 0, 'redirectEnd should be 0 in cross-origin request.');
+    test_equals(entry.domainLookupStart, 0, 'domainLookupStart should be 0 in cross-origin request.');
+    test_equals(entry.domainLookupEnd, 0, 'domainLookupEnd should be 0 in cross-origin request.');
+    test_equals(entry.connectStart, 0, 'connectStart should be 0 in cross-origin request.');
+    test_equals(entry.connectEnd, 0, 'connectEnd should be 0 in cross-origin request.');
+    test_equals(entry.requestStart, 0, 'requestStart should be 0 in cross-origin request.');
+    test_equals(entry.responseStart, 0, 'responseStart should be 0 in cross-origin request.');
+    test_equals(entry.secureConnectionStart, 0, 'secureConnectionStart should be 0 in cross-origin request.');
+    test_greater_than(entry.fetchStart, 0, 'fetchStart should be greater than 0 in cross-origin request.');
+    test_greater_than(entry.responseEnd, 0, 'responseEnd should be greater than 0 in cross-origin request.');
     done();
 }
 window.setup_iframe = setup_iframe;
diff --git a/tests/wpt/web-platform-tests/resources/chromium/chooser_service.mojom.js b/tests/wpt/web-platform-tests/resources/chromium/chooser_service.mojom.js
index 30bba4baad9..aee5d8741f3 100644
--- a/tests/wpt/web-platform-tests/resources/chromium/chooser_service.mojom.js
+++ b/tests/wpt/web-platform-tests/resources/chromium/chooser_service.mojom.js
@@ -2,19 +2,15 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
 'use strict';
 
 (function() {
-  var mojomId = 'device/usb/public/interfaces/chooser_service.mojom';
+  var mojomId = 'device/usb/public/mojom/chooser_service.mojom';
   if (mojo.internal.isMojomLoaded(mojomId)) {
     console.warn('The following mojom is loaded multiple times: ' + mojomId);
     return;
   }
   mojo.internal.markMojomLoaded(mojomId);
-
-  // TODO(yzshen): Define these aliases to minimize the differences between the
-  // old/new modes. Remove them when the old mode goes away.
   var bindings = mojo;
   var associatedBindings = mojo;
   var codec = mojo.internal;
@@ -25,13 +21,13 @@
       mojo.internal.exposeNamespace('device.mojom');
   if (mojo.config.autoLoadMojomDeps) {
     mojo.internal.loadMojomIfNecessary(
-        'device/usb/public/interfaces/device.mojom', 'device.mojom.js');
+        'device/usb/public/mojom/device.mojom', 'device.mojom.js');
   }
   var device_manager$ =
       mojo.internal.exposeNamespace('device.mojom');
   if (mojo.config.autoLoadMojomDeps) {
     mojo.internal.loadMojomIfNecessary(
-        'device/usb/public/interfaces/device_manager.mojom', 'device_manager.mojom.js');
+        'device/usb/public/mojom/device_manager.mojom', 'device_manager.mojom.js');
   }
 
 
@@ -66,7 +62,6 @@
         return err;
 
 
-    
     // validate UsbChooserService_GetPermission_Params.deviceFilters
     err = messageValidator.validateArrayPointer(offset + codec.kStructHeaderSize + 0, 8, new codec.PointerTo(device_manager$.UsbDeviceFilter), false, [0], 0);
     if (err !== validator.validationError.NONE)
@@ -122,7 +117,6 @@
         return err;
 
 
-    
     // validate UsbChooserService_GetPermission_ResponseParams.result
     err = messageValidator.validateStructPointer(offset + codec.kStructHeaderSize + 0, device$.UsbDeviceInfo, true);
     if (err !== validator.validationError.NONE)
diff --git a/tests/wpt/web-platform-tests/resources/chromium/device.mojom.js b/tests/wpt/web-platform-tests/resources/chromium/device.mojom.js
index ce5660cd52e..86c93dd66a5 100644
--- a/tests/wpt/web-platform-tests/resources/chromium/device.mojom.js
+++ b/tests/wpt/web-platform-tests/resources/chromium/device.mojom.js
@@ -2,19 +2,15 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
 'use strict';
 
 (function() {
-  var mojomId = 'device/usb/public/interfaces/device.mojom';
+  var mojomId = 'device/usb/public/mojom/device.mojom';
   if (mojo.internal.isMojomLoaded(mojomId)) {
     console.warn('The following mojom is loaded multiple times: ' + mojomId);
     return;
   }
   mojo.internal.markMojomLoaded(mojomId);
-
-  // TODO(yzshen): Define these aliases to minimize the differences between the
-  // old/new modes. Remove them when the old mode goes away.
   var bindings = mojo;
   var associatedBindings = mojo;
   var codec = mojo.internal;
@@ -25,7 +21,7 @@
       mojo.internal.exposeNamespace('mojo.common.mojom');
   if (mojo.config.autoLoadMojomDeps) {
     mojo.internal.loadMojomIfNecessary(
-        'mojo/common/string16.mojom', '../../../../mojo/common/string16.mojom.js');
+        'mojo/public/mojom/base/string16.mojom', '../../../../mojo/public/mojom/base/string16.mojom.js');
   }
 
 
@@ -212,14 +208,12 @@
 
 
 
-    
     // validate UsbEndpointInfo.direction
     err = messageValidator.validateEnum(offset + codec.kStructHeaderSize + 4, UsbTransferDirection);
     if (err !== validator.validationError.NONE)
         return err;
 
 
-    
     // validate UsbEndpointInfo.type
     err = messageValidator.validateEnum(offset + codec.kStructHeaderSize + 8, UsbTransferType);
     if (err !== validator.validationError.NONE)
@@ -297,14 +291,12 @@
 
 
 
-    
     // validate UsbAlternateInterfaceInfo.interfaceName
     err = messageValidator.validateStructPointer(offset + codec.kStructHeaderSize + 8, string16$.String16, true);
     if (err !== validator.validationError.NONE)
         return err;
 
 
-    
     // validate UsbAlternateInterfaceInfo.endpoints
     err = messageValidator.validateArrayPointer(offset + codec.kStructHeaderSize + 16, 8, new codec.PointerTo(UsbEndpointInfo), false, [0], 0);
     if (err !== validator.validationError.NONE)
@@ -380,7 +372,6 @@
 
 
 
-    
     // validate UsbInterfaceInfo.alternates
     err = messageValidator.validateArrayPointer(offset + codec.kStructHeaderSize + 8, 8, new codec.PointerTo(UsbAlternateInterfaceInfo), false, [0], 0);
     if (err !== validator.validationError.NONE)
@@ -455,14 +446,12 @@
 
 
 
-    
     // validate UsbConfigurationInfo.configurationName
     err = messageValidator.validateStructPointer(offset + codec.kStructHeaderSize + 8, string16$.String16, true);
     if (err !== validator.validationError.NONE)
         return err;
 
 
-    
     // validate UsbConfigurationInfo.interfaces
     err = messageValidator.validateArrayPointer(offset + codec.kStructHeaderSize + 16, 8, new codec.PointerTo(UsbInterfaceInfo), false, [0], 0);
     if (err !== validator.validationError.NONE)
@@ -552,7 +541,6 @@
         return err;
 
 
-    
     // validate UsbDeviceInfo.guid
     err = messageValidator.validateStringPointer(offset + codec.kStructHeaderSize + 0, false)
     if (err !== validator.validationError.NONE)
@@ -570,21 +558,18 @@
 
 
 
-    
     // validate UsbDeviceInfo.manufacturerName
     err = messageValidator.validateStructPointer(offset + codec.kStructHeaderSize + 24, string16$.String16, true);
     if (err !== validator.validationError.NONE)
         return err;
 
 
-    
     // validate UsbDeviceInfo.productName
     err = messageValidator.validateStructPointer(offset + codec.kStructHeaderSize + 32, string16$.String16, true);
     if (err !== validator.validationError.NONE)
         return err;
 
 
-    
     // validate UsbDeviceInfo.serialNumber
     err = messageValidator.validateStructPointer(offset + codec.kStructHeaderSize + 40, string16$.String16, true);
     if (err !== validator.validationError.NONE)
@@ -592,7 +577,6 @@
 
 
 
-    
     // validate UsbDeviceInfo.configurations
     err = messageValidator.validateArrayPointer(offset + codec.kStructHeaderSize + 48, 8, new codec.PointerTo(UsbConfigurationInfo), false, [0], 0);
     if (err !== validator.validationError.NONE)
@@ -688,14 +672,12 @@
         return err;
 
 
-    
     // validate UsbControlTransferParams.type
     err = messageValidator.validateEnum(offset + codec.kStructHeaderSize + 0, UsbControlTransferType);
     if (err !== validator.validationError.NONE)
         return err;
 
 
-    
     // validate UsbControlTransferParams.recipient
     err = messageValidator.validateEnum(offset + codec.kStructHeaderSize + 4, UsbControlTransferRecipient);
     if (err !== validator.validationError.NONE)
@@ -772,7 +754,6 @@
 
 
 
-    
     // validate UsbIsochronousPacket.status
     err = messageValidator.validateEnum(offset + codec.kStructHeaderSize + 8, UsbTransferStatus);
     if (err !== validator.validationError.NONE)
@@ -886,7 +867,6 @@
         return err;
 
 
-    
     // validate UsbDevice_Open_ResponseParams.error
     err = messageValidator.validateEnum(offset + codec.kStructHeaderSize + 0, UsbOpenDeviceError);
     if (err !== validator.validationError.NONE)
@@ -1814,7 +1794,6 @@
         return err;
 
 
-    
     // validate UsbDevice_ControlTransferIn_Params.params
     err = messageValidator.validateStructPointer(offset + codec.kStructHeaderSize + 0, UsbControlTransferParams, false);
     if (err !== validator.validationError.NONE)
@@ -1877,16 +1856,14 @@
         return err;
 
 
-    
     // validate UsbDevice_ControlTransferIn_ResponseParams.status
     err = messageValidator.validateEnum(offset + codec.kStructHeaderSize + 0, UsbTransferStatus);
     if (err !== validator.validationError.NONE)
         return err;
 
 
-    
     // validate UsbDevice_ControlTransferIn_ResponseParams.data
-    err = messageValidator.validateArrayPointer(offset + codec.kStructHeaderSize + 8, 1, codec.Uint8, true, [0], 0);
+    err = messageValidator.validateArrayPointer(offset + codec.kStructHeaderSize + 8, 1, codec.Uint8, false, [0], 0);
     if (err !== validator.validationError.NONE)
         return err;
 
@@ -1952,14 +1929,12 @@
         return err;
 
 
-    
     // validate UsbDevice_ControlTransferOut_Params.params
     err = messageValidator.validateStructPointer(offset + codec.kStructHeaderSize + 0, UsbControlTransferParams, false);
     if (err !== validator.validationError.NONE)
         return err;
 
 
-    
     // validate UsbDevice_ControlTransferOut_Params.data
     err = messageValidator.validateArrayPointer(offset + codec.kStructHeaderSize + 8, 1, codec.Uint8, false, [0], 0);
     if (err !== validator.validationError.NONE)
@@ -2028,7 +2003,6 @@
         return err;
 
 
-    
     // validate UsbDevice_ControlTransferOut_ResponseParams.status
     err = messageValidator.validateEnum(offset + codec.kStructHeaderSize + 0, UsbTransferStatus);
     if (err !== validator.validationError.NONE)
@@ -2165,16 +2139,14 @@
         return err;
 
 
-    
     // validate UsbDevice_GenericTransferIn_ResponseParams.status
     err = messageValidator.validateEnum(offset + codec.kStructHeaderSize + 0, UsbTransferStatus);
     if (err !== validator.validationError.NONE)
         return err;
 
 
-    
     // validate UsbDevice_GenericTransferIn_ResponseParams.data
-    err = messageValidator.validateArrayPointer(offset + codec.kStructHeaderSize + 8, 1, codec.Uint8, true, [0], 0);
+    err = messageValidator.validateArrayPointer(offset + codec.kStructHeaderSize + 8, 1, codec.Uint8, false, [0], 0);
     if (err !== validator.validationError.NONE)
         return err;
 
@@ -2241,7 +2213,6 @@
 
 
 
-    
     // validate UsbDevice_GenericTransferOut_Params.data
     err = messageValidator.validateArrayPointer(offset + codec.kStructHeaderSize + 8, 1, codec.Uint8, false, [0], 0);
     if (err !== validator.validationError.NONE)
@@ -2308,7 +2279,6 @@
         return err;
 
 
-    
     // validate UsbDevice_GenericTransferOut_ResponseParams.status
     err = messageValidator.validateEnum(offset + codec.kStructHeaderSize + 0, UsbTransferStatus);
     if (err !== validator.validationError.NONE)
@@ -2375,7 +2345,6 @@
 
 
 
-    
     // validate UsbDevice_IsochronousTransferIn_Params.packetLengths
     err = messageValidator.validateArrayPointer(offset + codec.kStructHeaderSize + 8, 4, codec.Uint32, false, [0], 0);
     if (err !== validator.validationError.NONE)
@@ -2443,14 +2412,12 @@
         return err;
 
 
-    
     // validate UsbDevice_IsochronousTransferIn_ResponseParams.data
-    err = messageValidator.validateArrayPointer(offset + codec.kStructHeaderSize + 0, 1, codec.Uint8, true, [0], 0);
+    err = messageValidator.validateArrayPointer(offset + codec.kStructHeaderSize + 0, 1, codec.Uint8, false, [0], 0);
     if (err !== validator.validationError.NONE)
         return err;
 
 
-    
     // validate UsbDevice_IsochronousTransferIn_ResponseParams.packets
     err = messageValidator.validateArrayPointer(offset + codec.kStructHeaderSize + 8, 8, new codec.PointerTo(UsbIsochronousPacket), false, [0], 0);
     if (err !== validator.validationError.NONE)
@@ -2512,14 +2479,12 @@
 
 
 
-    
     // validate UsbDevice_IsochronousTransferOut_Params.data
     err = messageValidator.validateArrayPointer(offset + codec.kStructHeaderSize + 8, 1, codec.Uint8, false, [0], 0);
     if (err !== validator.validationError.NONE)
         return err;
 
 
-    
     // validate UsbDevice_IsochronousTransferOut_Params.packetLengths
     err = messageValidator.validateArrayPointer(offset + codec.kStructHeaderSize + 16, 4, codec.Uint32, false, [0], 0);
     if (err !== validator.validationError.NONE)
@@ -2588,7 +2553,6 @@
         return err;
 
 
-    
     // validate UsbDevice_IsochronousTransferOut_ResponseParams.packets
     err = messageValidator.validateArrayPointer(offset + codec.kStructHeaderSize + 0, 8, new codec.PointerTo(UsbIsochronousPacket), false, [0], 0);
     if (err !== validator.validationError.NONE)
diff --git a/tests/wpt/web-platform-tests/resources/chromium/device_manager.mojom.js b/tests/wpt/web-platform-tests/resources/chromium/device_manager.mojom.js
index 99ebd854be0..2e1b30164b9 100644
--- a/tests/wpt/web-platform-tests/resources/chromium/device_manager.mojom.js
+++ b/tests/wpt/web-platform-tests/resources/chromium/device_manager.mojom.js
@@ -2,19 +2,15 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
 'use strict';
 
 (function() {
-  var mojomId = 'device/usb/public/interfaces/device_manager.mojom';
+  var mojomId = 'device/usb/public/mojom/device_manager.mojom';
   if (mojo.internal.isMojomLoaded(mojomId)) {
     console.warn('The following mojom is loaded multiple times: ' + mojomId);
     return;
   }
   mojo.internal.markMojomLoaded(mojomId);
-
-  // TODO(yzshen): Define these aliases to minimize the differences between the
-  // old/new modes. Remove them when the old mode goes away.
   var bindings = mojo;
   var associatedBindings = mojo;
   var codec = mojo.internal;
@@ -25,13 +21,13 @@
       mojo.internal.exposeNamespace('device.mojom');
   if (mojo.config.autoLoadMojomDeps) {
     mojo.internal.loadMojomIfNecessary(
-        'device/usb/public/interfaces/device.mojom', 'device.mojom.js');
+        'device/usb/public/mojom/device.mojom', 'device.mojom.js');
   }
   var string16$ =
       mojo.internal.exposeNamespace('mojo.common.mojom');
   if (mojo.config.autoLoadMojomDeps) {
     mojo.internal.loadMojomIfNecessary(
-        'mojo/common/string16.mojom', '../../../../mojo/common/string16.mojom.js');
+        'mojo/public/mojom/base/string16.mojom', '../../../../mojo/public/mojom/base/string16.mojom.js');
   }
 
 
@@ -86,7 +82,6 @@
 
 
 
-    
     // validate UsbDeviceFilter.serialNumber
     err = messageValidator.validateStructPointer(offset + codec.kStructHeaderSize + 8, string16$.String16, true);
     if (err !== validator.validationError.NONE)
@@ -165,7 +160,6 @@
         return err;
 
 
-    
     // validate UsbEnumerationOptions.filters
     err = messageValidator.validateArrayPointer(offset + codec.kStructHeaderSize + 0, 8, new codec.PointerTo(UsbDeviceFilter), false, [0], 0);
     if (err !== validator.validationError.NONE)
@@ -221,7 +215,6 @@
         return err;
 
 
-    
     // validate UsbDeviceManager_GetDevices_Params.options
     err = messageValidator.validateStructPointer(offset + codec.kStructHeaderSize + 0, UsbEnumerationOptions, true);
     if (err !== validator.validationError.NONE)
@@ -277,7 +270,6 @@
         return err;
 
 
-    
     // validate UsbDeviceManager_GetDevices_ResponseParams.results
     err = messageValidator.validateArrayPointer(offset + codec.kStructHeaderSize + 0, 8, new codec.PointerTo(device$.UsbDeviceInfo), false, [0], 0);
     if (err !== validator.validationError.NONE)
@@ -334,14 +326,12 @@
         return err;
 
 
-    
     // validate UsbDeviceManager_GetDevice_Params.guid
     err = messageValidator.validateStringPointer(offset + codec.kStructHeaderSize + 0, false)
     if (err !== validator.validationError.NONE)
         return err;
 
 
-    
     // validate UsbDeviceManager_GetDevice_Params.deviceRequest
     err = messageValidator.validateInterfaceRequest(offset + codec.kStructHeaderSize + 8, false)
     if (err !== validator.validationError.NONE)
@@ -407,7 +397,6 @@
         return err;
 
 
-    
     // validate UsbDeviceManager_SetClient_Params.client
     err = messageValidator.validateInterface(offset + codec.kStructHeaderSize + 0, false);
     if (err !== validator.validationError.NONE)
@@ -463,7 +452,6 @@
         return err;
 
 
-    
     // validate UsbDeviceManagerClient_OnDeviceAdded_Params.deviceInfo
     err = messageValidator.validateStructPointer(offset + codec.kStructHeaderSize + 0, device$.UsbDeviceInfo, false);
     if (err !== validator.validationError.NONE)
@@ -519,7 +507,6 @@
         return err;
 
 
-    
     // validate UsbDeviceManagerClient_OnDeviceRemoved_Params.deviceInfo
     err = messageValidator.validateStructPointer(offset + codec.kStructHeaderSize + 0, device$.UsbDeviceInfo, false);
     if (err !== validator.validationError.NONE)
diff --git a/tests/wpt/web-platform-tests/resources/chromium/fake_bluetooth.mojom.js b/tests/wpt/web-platform-tests/resources/chromium/fake_bluetooth.mojom.js
index dd2d6533bc0..7028fcb8eca 100644
--- a/tests/wpt/web-platform-tests/resources/chromium/fake_bluetooth.mojom.js
+++ b/tests/wpt/web-platform-tests/resources/chromium/fake_bluetooth.mojom.js
@@ -5,7 +5,7 @@
 'use strict';
 
 (function() {
-  var mojomId = 'device/bluetooth/public/interfaces/test/fake_bluetooth.mojom';
+  var mojomId = 'device/bluetooth/public/mojom/test/fake_bluetooth.mojom';
   if (mojo.internal.isMojomLoaded(mojomId)) {
     console.warn('The following mojom is loaded multiple times: ' + mojomId);
     return;
@@ -21,7 +21,7 @@
       mojo.internal.exposeNamespace('bluetooth.mojom');
   if (mojo.config.autoLoadMojomDeps) {
     mojo.internal.loadMojomIfNecessary(
-        'device/bluetooth/public/interfaces/uuid.mojom', '../uuid.mojom.js');
+        'device/bluetooth/public/mojom/uuid.mojom', '../uuid.mojom.js');
   }
 
 
@@ -1256,7 +1256,7 @@
 
 
   FakeCentral_RemoveFakeService_Params.prototype.initDefaults_ = function() {
-    this.identifier = null;
+    this.serviceId = null;
     this.peripheralAddress = null;
   };
   FakeCentral_RemoveFakeService_Params.prototype.initFields_ = function(fields) {
@@ -1280,7 +1280,7 @@
         return err;
 
 
-    // validate FakeCentral_RemoveFakeService_Params.identifier
+    // validate FakeCentral_RemoveFakeService_Params.serviceId
     err = messageValidator.validateStringPointer(offset + codec.kStructHeaderSize + 0, false)
     if (err !== validator.validationError.NONE)
         return err;
@@ -1301,7 +1301,7 @@
     var val = new FakeCentral_RemoveFakeService_Params();
     var numberOfBytes = decoder.readUint32();
     var version = decoder.readUint32();
-    val.identifier = decoder.decodeStruct(codec.String);
+    val.serviceId = decoder.decodeStruct(codec.String);
     val.peripheralAddress = decoder.decodeStruct(codec.String);
     return val;
   };
@@ -1310,7 +1310,7 @@
     var packed;
     encoder.writeUint32(FakeCentral_RemoveFakeService_Params.encodedSize);
     encoder.writeUint32(0);
-    encoder.encodeStruct(codec.String, val.identifier);
+    encoder.encodeStruct(codec.String, val.serviceId);
     encoder.encodeStruct(codec.String, val.peripheralAddress);
   };
   function FakeCentral_RemoveFakeService_ResponseParams(values) {
@@ -3017,9 +3017,9 @@
         .apply(this.ptr.getProxy(), arguments);
   };
 
-  FakeCentralProxy.prototype.removeFakeService = function(identifier, peripheralAddress) {
+  FakeCentralProxy.prototype.removeFakeService = function(serviceId, peripheralAddress) {
     var params = new FakeCentral_RemoveFakeService_Params();
-    params.identifier = identifier;
+    params.serviceId = serviceId;
     params.peripheralAddress = peripheralAddress;
     return new Promise(function(resolve, reject) {
       var builder = new codec.MessageV1Builder(
@@ -3285,8 +3285,8 @@
   FakeCentralStub.prototype.addFakeService = function(peripheralAddress, serviceUuid) {
     return this.delegate_ && this.delegate_.addFakeService && this.delegate_.addFakeService(peripheralAddress, serviceUuid);
   }
-  FakeCentralStub.prototype.removeFakeService = function(identifier, peripheralAddress) {
-    return this.delegate_ && this.delegate_.removeFakeService && this.delegate_.removeFakeService(identifier, peripheralAddress);
+  FakeCentralStub.prototype.removeFakeService = function(serviceId, peripheralAddress) {
+    return this.delegate_ && this.delegate_.removeFakeService && this.delegate_.removeFakeService(serviceId, peripheralAddress);
   }
   FakeCentralStub.prototype.addFakeCharacteristic = function(characteristicUuid, properties, serviceId, peripheralAddress) {
     return this.delegate_ && this.delegate_.addFakeCharacteristic && this.delegate_.addFakeCharacteristic(characteristicUuid, properties, serviceId, peripheralAddress);
@@ -3422,7 +3422,7 @@
       return true;
     case kFakeCentral_RemoveFakeService_Name:
       var params = reader.decodeStruct(FakeCentral_RemoveFakeService_Params);
-      this.removeFakeService(params.identifier, params.peripheralAddress).then(function(response) {
+      this.removeFakeService(params.serviceId, params.peripheralAddress).then(function(response) {
         var responseParams =
             new FakeCentral_RemoveFakeService_ResponseParams();
         responseParams.success = response.success;
diff --git a/tests/wpt/web-platform-tests/resources/chromium/string16.mojom.js b/tests/wpt/web-platform-tests/resources/chromium/string16.mojom.js
index 058956bf169..9dbb35664fa 100644
--- a/tests/wpt/web-platform-tests/resources/chromium/string16.mojom.js
+++ b/tests/wpt/web-platform-tests/resources/chromium/string16.mojom.js
@@ -7,7 +7,7 @@
 if ((typeof mojo !== 'undefined')  && mojo.internal && mojo.config) {
 
 (function() {
-  var mojomId = 'mojo/common/string16.mojom';
+  var mojomId = 'mojo/public/mojom/base/string16.mojom';
   if (mojo.internal.isMojomLoaded(mojomId)) {
     console.warn('The following mojom is loaded multiple times: ' + mojomId);
     return;
@@ -87,7 +87,7 @@ if ((typeof mojo !== 'undefined')  && mojo.internal && mojo.config) {
 
 if ((typeof mojo === 'undefined') || !mojo.internal || !mojo.config) {
 
-define("mojo/common/string16.mojom", [
+define("mojo/public/mojom/base/string16.mojom", [
     "mojo/public/js/associated_bindings",
     "mojo/public/js/bindings",
     "mojo/public/js/codec",
diff --git a/tests/wpt/web-platform-tests/resources/chromium/uuid.mojom.js b/tests/wpt/web-platform-tests/resources/chromium/uuid.mojom.js
index 03a8b8d3c9e..3b1b616ee34 100644
--- a/tests/wpt/web-platform-tests/resources/chromium/uuid.mojom.js
+++ b/tests/wpt/web-platform-tests/resources/chromium/uuid.mojom.js
@@ -5,15 +5,12 @@
 'use strict';
 
 (function() {
-  var mojomId = 'device/bluetooth/public/interfaces/uuid.mojom';
+  var mojomId = 'device/bluetooth/public/mojom/uuid.mojom';
   if (mojo.internal.isMojomLoaded(mojomId)) {
     console.warn('The following mojom is loaded multiple times: ' + mojomId);
     return;
   }
   mojo.internal.markMojomLoaded(mojomId);
-
-  // TODO(yzshen): Define these aliases to minimize the differences between the
-  // old/new modes. Remove them when the old mode goes away.
   var bindings = mojo;
   var associatedBindings = mojo;
   var codec = mojo.internal;
diff --git a/tests/wpt/web-platform-tests/resources/chromium/webusb-test.js b/tests/wpt/web-platform-tests/resources/chromium/webusb-test.js
index 08c82547ed8..502dd5c6394 100644
--- a/tests/wpt/web-platform-tests/resources/chromium/webusb-test.js
+++ b/tests/wpt/web-platform-tests/resources/chromium/webusb-test.js
@@ -20,12 +20,12 @@ let internal = {
 };
 
 // Converts an ECMAScript String object to an instance of
-// mojo.common.mojom.String16.
+// mojo_base.mojom.String16.
 function mojoString16ToString(string16) {
   return String.fromCharCode.apply(null, string16.data);
 }
 
-// Converts an instance of mojo.common.mojom.String16 to an ECMAScript String.
+// Converts an instance of mojo_base.mojom.String16 to an ECMAScript String.
 function stringToMojoString16(string) {
   let array = new Array(string.length);
   for (var i = 0; i < string.length; ++i) {
diff --git a/tests/wpt/web-platform-tests/service-workers/service-worker/fetch-canvas-tainting-video-with-range-request.https.html b/tests/wpt/web-platform-tests/service-workers/service-worker/fetch-canvas-tainting-video-with-range-request.https.html
new file mode 100644
index 00000000000..f1ff7ae59a7
--- /dev/null
+++ b/tests/wpt/web-platform-tests/service-workers/service-worker/fetch-canvas-tainting-video-with-range-request.https.html
@@ -0,0 +1,93 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Canvas tainting due to video whose responses are fetched via a service worker including range requests</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="resources/test-helpers.sub.js?pipe=sub"></script>
+<script src="/common/get-host-info.sub.js"></script>
+<body>
+<script>
+// These tests try to test canvas tainting due to a <video> element. The video
+// src URL is same-origin as the page, but the response is fetched via a service
+// worker that does tricky things like returning opaque responses from another
+// origin. Furthermore, this tests range requests so there are multiple
+// responses.
+//
+// We test range requests by having the server return 206 Partial Content to the
+// first request (which doesn't necessarily have a "Range" header or one with a
+// byte range). Then the <video> element automatically makes ranged requests
+// (the "Range" HTTP request header specifies a byte range). The server responds
+// to these with 206 Partial Content for the given range.
+function range_request_test(script, expected, description) {
+  promise_test(t => {
+      let frame;
+      let registration;
+      add_result_callback(() => {
+          if (frame) frame.remove();
+          if (registration) registration.unregister();
+        });
+
+      const scope = 'resources/fetch-canvas-tainting-iframe.html';
+      return service_worker_unregister_and_register(t, script, scope)
+        .then(r => {
+            registration = r;
+            return wait_for_state(t, registration.installing, 'activated');
+          })
+        .then(() => {
+            return with_iframe(scope);
+          })
+        .then(f => {
+            frame = f;
+            // Add "?VIDEO&PartialContent" to get a video resource from the
+            // server using range requests.
+            const video_url = 'fetch-access-control.py?VIDEO&PartialContent';
+            return frame.contentWindow.create_test_case_promise(video_url);
+          })
+        .then(result => {
+            assert_equals(result, expected);
+          });
+    }, description);
+}
+
+// We want to consider a number of scenarios:
+// (1) Range responses come from a single origin, the same-origin as the page.
+//     The canvas should not be tainted.
+range_request_test(
+  'resources/fetch-event-network-fallback-worker.js',
+  'NOT_TAINTED',
+  'range responses from single origin (same-origin)');
+
+// (2) Range responses come from a single origin, cross-origin from the page
+//     (and without CORS sharing). This is not possible to test, since service
+//     worker can't make a request with a "Range" HTTP header in no-cors mode.
+
+// (3) Range responses come from multiple origins. The first response comes from
+//     cross-origin (and without CORS sharing, so is opaque). Subsequent
+//     responses come from same-origin. The canvas should be tainted (but in
+//     Chrome this is a LOAD_ERROR since it disallows range responses from
+//     multiple origins, period).
+range_request_test(
+  'resources/range-request-to-different-origins-worker.js',
+  'TAINTED',
+  'range responses from multiple origins (cross-origin first)');
+
+// (4) Range responses come from multiple origins. The first response comes from
+//     same-origin. Subsequent responses come from cross-origin (and without
+//     CORS sharing). Like (2) this is not possible since the service worker
+//     cannot make range requests cross-origin.
+
+// (5) Range responses come from a single origin, with a mix of opaque and
+//     non-opaque responses. The first request uses 'no-cors' mode to
+//     receive an opaque response, and subsequent range requests use 'cors'
+//     to receive non-opaque responses. The canvas should be tainted.
+range_request_test(
+  'resources/range-request-with-different-cors-modes-worker.js',
+  'TAINTED',
+  'range responses from single origin with both opaque and non-opaque responses');
+
+// (6) Range responses come from a single origin, with a mix of opaque and
+//     non-opaque responses. The first request uses 'cors' mode to
+//     receive an non-opaque response, and subsequent range requests use
+//     'no-cors' to receive non-opaque responses. Like (2) this is not possible.
+</script>
+</body>
diff --git a/tests/wpt/web-platform-tests/service-workers/service-worker/fetch-event-respond-with-body-loaded-in-chunk.https.html b/tests/wpt/web-platform-tests/service-workers/service-worker/fetch-event-respond-with-body-loaded-in-chunk.https.html
new file mode 100644
index 00000000000..824b6f3217b
--- /dev/null
+++ b/tests/wpt/web-platform-tests/service-workers/service-worker/fetch-event-respond-with-body-loaded-in-chunk.https.html
@@ -0,0 +1,23 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>respondWith with a response whose body is being loaded from the network by chunks</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="resources/test-helpers.sub.js"></script>
+<script>
+'use strict';
+
+const WORKER = 'resources/fetch-event-respond-with-body-loaded-in-chunk-worker.js';
+const SCOPE = 'resources/fetch-event-respond-with-body-loaded-in-chunk-iframe.html';
+
+promise_test(async t => {
+    var reg = await service_worker_unregister_and_register(t, WORKER, SCOPE);
+    add_completion_callback(() => reg.unregister());
+    await wait_for_state(t, reg.installing, 'activated');
+    let iframe = await with_iframe(SCOPE);
+    t.add_cleanup(() => iframe.remove());
+
+    let response = await iframe.contentWindow.fetch('body-in-chunk');
+    assert_equals(await response.text(), 'TEST_TRICKLE\nTEST_TRICKLE\nTEST_TRICKLE\nTEST_TRICKLE\n');
+}, 'Respond by chunks with a Response being loaded');
+</script>
diff --git a/tests/wpt/web-platform-tests/service-workers/service-worker/fetch-event-respond-with-readable-stream-chunk.https.html b/tests/wpt/web-platform-tests/service-workers/service-worker/fetch-event-respond-with-readable-stream-chunk.https.html
new file mode 100644
index 00000000000..4544a9e08f5
--- /dev/null
+++ b/tests/wpt/web-platform-tests/service-workers/service-worker/fetch-event-respond-with-readable-stream-chunk.https.html
@@ -0,0 +1,23 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>respondWith with a response built from a ReadableStream</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="resources/test-helpers.sub.js"></script>
+<script>
+'use strict';
+
+const WORKER = 'resources/fetch-event-respond-with-readable-stream-chunk-worker.js';
+const SCOPE = 'resources/fetch-event-respond-with-readable-stream-chunk-iframe.html';
+
+promise_test(async t => {
+    var reg = await service_worker_unregister_and_register(t, WORKER, SCOPE);
+    add_completion_callback(() => reg.unregister());
+    await wait_for_state(t, reg.installing, 'activated');
+    let iframe = await with_iframe(SCOPE);
+    t.add_cleanup(() => iframe.remove());
+
+    let response = await iframe.contentWindow.fetch('body-stream');
+    assert_equals(await response.text(), 'chunk #1 chunk #2 chunk #3 chunk #4');
+}, 'Respond by chunks with a Response built from a ReadableStream');
+</script>
diff --git a/tests/wpt/web-platform-tests/service-workers/service-worker/fetch-request-resources.https.html b/tests/wpt/web-platform-tests/service-workers/service-worker/fetch-request-resources.https.html
index 92ef4684668..336e6ed89d7 100644
--- a/tests/wpt/web-platform-tests/service-workers/service-worker/fetch-request-resources.https.html
+++ b/tests/wpt/web-platform-tests/service-workers/service-worker/fetch-request-resources.https.html
@@ -8,6 +8,14 @@
 var url_count = 0;
 var expected_results = {};
 
+function add_promise_to_test(url)
+{
+  var expected = expected_results[url];
+  return new Promise((resolve) => {
+    expected.resolve = resolve;
+  });
+}
+
 function image_test(frame, url, cross_origin, expected_mode,
                     expected_credentials) {
   var actual_url = url + (++url_count);
@@ -20,7 +28,8 @@ function image_test(frame, url, cross_origin, expected_mode,
       message: 'Image load (url:' +
                actual_url + ' cross_origin:' + cross_origin + ')'
     };
-  return frame.contentWindow.load_image(actual_url, cross_origin);
+  frame.contentWindow.load_image(actual_url, cross_origin);
+  return add_promise_to_test(actual_url);
 }
 
 function script_test(frame, url, cross_origin, expected_mode,
@@ -35,7 +44,8 @@ function script_test(frame, url, cross_origin, expected_mode,
       message: 'Script load (url:' +
                actual_url + ' cross_origin:' + cross_origin + ')'
     };
-  return frame.contentWindow.load_script(actual_url, cross_origin);
+  frame.contentWindow.load_script(actual_url, cross_origin);
+  return add_promise_to_test(actual_url);
 }
 
 function css_test(frame, url, cross_origin, expected_mode,
@@ -50,7 +60,8 @@ function css_test(frame, url, cross_origin, expected_mode,
       message: 'CSS load (url:' +
                actual_url + ' cross_origin:' + cross_origin + ')'
     };
-  return frame.contentWindow.load_css(actual_url, cross_origin);
+  frame.contentWindow.load_css(actual_url, cross_origin);
+  return add_promise_to_test(actual_url);
 }
 
 function font_face_test(frame, url, expected_mode, expected_credentials) {
@@ -63,7 +74,8 @@ function font_face_test(frame, url, expected_mode, expected_credentials) {
       integrity: '',
       message: 'FontFace load (url:' + actual_url + ')'
     };
-  return frame.contentWindow.load_font(actual_url);
+  frame.contentWindow.load_font(actual_url);
+  return add_promise_to_test(actual_url);
 }
 
 function script_integrity_test(frame, url, integrity, expected_integrity) {
@@ -76,7 +88,8 @@ function script_integrity_test(frame, url, integrity, expected_integrity) {
       integrity: expected_integrity,
       message: 'Script load (url:' + actual_url + ')'
     };
-  return frame.contentWindow.load_script_with_integrity(actual_url, integrity);
+  frame.contentWindow.load_script_with_integrity(actual_url, integrity);
+  return add_promise_to_test(actual_url);
 }
 
 function css_integrity_test(frame, url, integrity, expected_integrity) {
@@ -89,7 +102,8 @@ function css_integrity_test(frame, url, integrity, expected_integrity) {
       integrity: expected_integrity,
       message: 'CSS load (url:' + actual_url + ')'
     };
-  return frame.contentWindow.load_css_with_integrity(actual_url, integrity);
+  frame.contentWindow.load_css_with_integrity(actual_url, integrity);
+  return add_promise_to_test(actual_url);
 }
 
 function fetch_test(frame, url, mode, credentials,
@@ -103,8 +117,10 @@ function fetch_test(frame, url, mode, credentials,
       message: 'fetch (url:' + actual_url + ' mode:' + mode + ' credentials:' +
                credentials + ')'
     };
-  return frame.contentWindow.fetch(
-      new Request(actual_url, {mode: mode, credentials: credentials}));
+  frame.contentWindow.fetch(
+      new Request(actual_url, {mode: mode, credentials: credentials})).then(() => {
+      }, () => { });
+  return add_promise_to_test(actual_url);
 }
 
 function audio_test(frame, url, cross_origin,
@@ -118,10 +134,11 @@ function audio_test(frame, url, cross_origin,
       message: 'Audio load (url:' + actual_url + ' cross_origin:' +
                cross_origin + ')'
     };
-  return frame.contentWindow.load_audio(actual_url, cross_origin);
+  frame.contentWindow.load_audio(actual_url, cross_origin);
+  return add_promise_to_test(actual_url);
 }
 
-async_test(function(t) {
+promise_test(function(t) {
     var SCOPE = 'resources/fetch-request-resources-iframe.https.html';
     var SCRIPT = 'resources/fetch-request-resources-worker.js';
     var host_info = get_host_info();
@@ -131,13 +148,13 @@ async_test(function(t) {
       host_info['HTTPS_REMOTE_ORIGIN'] + base_path() + 'resources/dummy?test';
     var worker;
     var frame;
-    service_worker_unregister_and_register(t, SCRIPT, SCOPE)
+    return service_worker_unregister_and_register(t, SCRIPT, SCOPE)
       .then(function(registration) {
           worker = registration.installing;
           return wait_for_state(t, worker, 'activated');
         })
       .then(function() {
-          return new Promise(function(resolve) {
+          return new Promise(function(resolve, reject) {
               var channel = new MessageChannel();
               channel.port1.onmessage = t.step_func(function(msg) {
                 if (msg.data.ready) {
@@ -149,110 +166,110 @@ async_test(function(t) {
                 if (!expected) {
                   return;
                 }
-                assert_equals(
+                test(() => {
+                  assert_equals(
                     result.mode, expected.mode,
                     'mode of ' + expected.message +  ' must be ' +
                     expected.mode + '.');
-                assert_equals(
+                  assert_equals(
                     result.credentials, expected.credentials,
                     'credentials of ' + expected.message +  ' must be ' +
                     expected.credentials + '.');
-                 assert_equals(
+                   assert_equals(
                     result.redirect, expected.redirect,
                     'redirect mode of ' + expected.message +  ' must be ' +
                     expected.redirect + '.');
-                assert_equals(
+                  assert_equals(
                     result.integrity, expected.integrity,
                     'integrity of ' + expected.message +  ' must be ' +
                     expected.integrity + '.');
-                --url_count;
+                }, expected.message);
+                expected.resolve();
                 delete expected_results[result.url];
-                if (url_count == 0) {
-                  frame.remove();
-                  service_worker_unregister_and_done(t, SCOPE);
-                }
               });
               worker.postMessage(
                 {port: channel.port2}, [channel.port2]);
             });
         })
       .then(function() { return with_iframe(SCOPE); })
-      .then(function(f) {
+      .then(async function(f) {
         frame = f;
 
-        image_test(f, LOCAL_URL, '', 'no-cors', 'include');
-        image_test(f, REMOTE_URL, '', 'no-cors', 'include');
-        css_test(f, LOCAL_URL, '', 'no-cors', 'include');
-        css_test(f, REMOTE_URL, '', 'no-cors', 'include');
+        await image_test(f, LOCAL_URL, '', 'no-cors', 'include');
+        await image_test(f, REMOTE_URL, '', 'no-cors', 'include');
+        await css_test(f, LOCAL_URL, '', 'no-cors', 'include');
+        await css_test(f, REMOTE_URL, '', 'no-cors', 'include');
+
+        await image_test(f, LOCAL_URL, 'anonymous', 'cors', 'same-origin');
+        await image_test(f, LOCAL_URL, 'use-credentials', 'cors', 'include');
+        await image_test(f, REMOTE_URL, '', 'no-cors', 'include');
+        await image_test(f, REMOTE_URL, 'anonymous', 'cors', 'same-origin');
+        await image_test(f, REMOTE_URL, 'use-credentials', 'cors', 'include');
 
-        image_test(f, LOCAL_URL, 'anonymous', 'cors', 'same-origin');
-        image_test(f, LOCAL_URL, 'use-credentials', 'cors', 'include');
-        image_test(f, REMOTE_URL, '', 'no-cors', 'include');
-        image_test(f, REMOTE_URL, 'anonymous', 'cors', 'same-origin');
-        image_test(f, REMOTE_URL, 'use-credentials', 'cors', 'include');
+        await script_test(f, LOCAL_URL, '', 'no-cors', 'include');
+        await script_test(f, LOCAL_URL, 'anonymous', 'cors', 'same-origin');
+        await script_test(f, LOCAL_URL, 'use-credentials', 'cors', 'include');
+        await script_test(f, REMOTE_URL, '', 'no-cors', 'include');
+        await script_test(f, REMOTE_URL, 'anonymous', 'cors', 'same-origin');
+        await script_test(f, REMOTE_URL, 'use-credentials', 'cors', 'include');
 
-        script_test(f, LOCAL_URL, '', 'no-cors', 'include');
-        script_test(f, LOCAL_URL, 'anonymous', 'cors', 'same-origin');
-        script_test(f, LOCAL_URL, 'use-credentials', 'cors', 'include');
-        script_test(f, REMOTE_URL, '', 'no-cors', 'include');
-        script_test(f, REMOTE_URL, 'anonymous', 'cors', 'same-origin');
-        script_test(f, REMOTE_URL, 'use-credentials', 'cors', 'include');
+        await css_test(f, LOCAL_URL, '', 'no-cors', 'include');
+        await css_test(f, LOCAL_URL, 'anonymous', 'cors', 'same-origin');
+        await css_test(f, LOCAL_URL, 'use-credentials', 'cors', 'include');
+        await css_test(f, REMOTE_URL, '', 'no-cors', 'include');
+        await css_test(f, REMOTE_URL, 'anonymous', 'cors', 'same-origin');
+        await css_test(f, REMOTE_URL, 'use-credentials', 'cors', 'include');
 
-        css_test(f, LOCAL_URL, '', 'no-cors', 'include');
-        css_test(f, LOCAL_URL, 'anonymous', 'cors', 'same-origin');
-        css_test(f, LOCAL_URL, 'use-credentials', 'cors', 'include');
-        css_test(f, REMOTE_URL, '', 'no-cors', 'include');
-        css_test(f, REMOTE_URL, 'anonymous', 'cors', 'same-origin');
-        css_test(f, REMOTE_URL, 'use-credentials', 'cors', 'include');
+        await font_face_test(f, LOCAL_URL, 'cors', 'same-origin');
+        await font_face_test(f, REMOTE_URL, 'cors', 'same-origin');
 
-        font_face_test(f, LOCAL_URL, 'cors', 'same-origin');
-        font_face_test(f, REMOTE_URL, 'cors', 'same-origin');
+        await script_integrity_test(f, LOCAL_URL, '     ', '     ');
+        await script_integrity_test(f, LOCAL_URL,
+                               'This is not a valid integrity because it has no dashes',
+                               'This is not a valid integrity because it has no dashes');
+        await script_integrity_test(f, LOCAL_URL, 'sha256-', 'sha256-');
+        await script_integrity_test(f, LOCAL_URL, 'sha256-foo?123', 'sha256-foo?123');
+        await script_integrity_test(f, LOCAL_URL, 'sha256-foo sha384-abc ', 'sha256-foo sha384-abc ');
+        await script_integrity_test(f, LOCAL_URL, 'sha256-foo sha256-abc', 'sha256-foo sha256-abc');
 
-        script_integrity_test(f, LOCAL_URL, '     ', '     ');
-        script_integrity_test(f, LOCAL_URL,
-                              'This is not a valid integrity because it has no dashes',
-                              'This is not a valid integrity because it has no dashes');
-        script_integrity_test(f, LOCAL_URL, 'sha256-', 'sha256-');
-        script_integrity_test(f, LOCAL_URL, 'sha256-foo?123', 'sha256-foo?123');
-        script_integrity_test(f, LOCAL_URL, 'sha256-foo sha384-abc ', 'sha256-foo sha384-abc ');
-        script_integrity_test(f, LOCAL_URL, 'sha256-foo sha256-abc', 'sha256-foo sha256-abc');
+        await css_integrity_test(f, LOCAL_URL, '     ', '     ');
+        await css_integrity_test(f, LOCAL_URL,
+                            'This is not a valid integrity because it has no dashes',
+                            'This is not a valid integrity because it has no dashes');
+        await css_integrity_test(f, LOCAL_URL, 'sha256-', 'sha256-');
+        await css_integrity_test(f, LOCAL_URL, 'sha256-foo?123', 'sha256-foo?123');
+        await css_integrity_test(f, LOCAL_URL, 'sha256-foo sha384-abc ', 'sha256-foo sha384-abc ');
+        await css_integrity_test(f, LOCAL_URL, 'sha256-foo sha256-abc', 'sha256-foo sha256-abc');
 
-        css_integrity_test(f, LOCAL_URL, '     ', '     ');
-        css_integrity_test(f, LOCAL_URL,
-                           'This is not a valid integrity because it has no dashes',
-                           'This is not a valid integrity because it has no dashes');
-        css_integrity_test(f, LOCAL_URL, 'sha256-', 'sha256-');
-        css_integrity_test(f, LOCAL_URL, 'sha256-foo?123', 'sha256-foo?123');
-        css_integrity_test(f, LOCAL_URL, 'sha256-foo sha384-abc ', 'sha256-foo sha384-abc ');
-        css_integrity_test(f, LOCAL_URL, 'sha256-foo sha256-abc', 'sha256-foo sha256-abc');
+        await fetch_test(f, LOCAL_URL, 'same-origin', 'omit', 'same-origin', 'omit');
+        await fetch_test(f, LOCAL_URL, 'same-origin', 'same-origin',
+                    'same-origin', 'same-origin');
+        await fetch_test(f, LOCAL_URL, 'same-origin', 'include',
+                    'same-origin', 'include');
+        await fetch_test(f, LOCAL_URL, 'no-cors', 'omit', 'no-cors', 'omit');
+        await fetch_test(f, LOCAL_URL, 'no-cors', 'same-origin',
+                    'no-cors', 'same-origin');
+        await fetch_test(f, LOCAL_URL, 'no-cors', 'include', 'no-cors', 'include');
+        await fetch_test(f, LOCAL_URL, 'cors', 'omit', 'cors', 'omit');
+        await fetch_test(f, LOCAL_URL, 'cors', 'same-origin', 'cors', 'same-origin');
+        await fetch_test(f, LOCAL_URL, 'cors', 'include', 'cors', 'include');
+        await fetch_test(f, REMOTE_URL, 'no-cors', 'omit', 'no-cors', 'omit');
+        await fetch_test(f, REMOTE_URL, 'no-cors', 'same-origin',
+                    'no-cors', 'same-origin');
+        await fetch_test(f, REMOTE_URL, 'no-cors', 'include', 'no-cors', 'include');
+        await fetch_test(f, REMOTE_URL, 'cors', 'omit', 'cors', 'omit');
+        await fetch_test(f, REMOTE_URL, 'cors', 'same-origin', 'cors', 'same-origin');
+        await fetch_test(f, REMOTE_URL, 'cors', 'include', 'cors', 'include');
 
-        fetch_test(f, LOCAL_URL, 'same-origin', 'omit', 'same-origin', 'omit');
-        fetch_test(f, LOCAL_URL, 'same-origin', 'same-origin',
-                   'same-origin', 'same-origin');
-        fetch_test(f, LOCAL_URL, 'same-origin', 'include',
-                   'same-origin', 'include');
-        fetch_test(f, LOCAL_URL, 'no-cors', 'omit', 'no-cors', 'omit');
-        fetch_test(f, LOCAL_URL, 'no-cors', 'same-origin',
-                   'no-cors', 'same-origin');
-        fetch_test(f, LOCAL_URL, 'no-cors', 'include', 'no-cors', 'include');
-        fetch_test(f, LOCAL_URL, 'cors', 'omit', 'cors', 'omit');
-        fetch_test(f, LOCAL_URL, 'cors', 'same-origin', 'cors', 'same-origin');
-        fetch_test(f, LOCAL_URL, 'cors', 'include', 'cors', 'include');
-        fetch_test(f, REMOTE_URL, 'no-cors', 'omit', 'no-cors', 'omit');
-        fetch_test(f, REMOTE_URL, 'no-cors', 'same-origin',
-                   'no-cors', 'same-origin');
-        fetch_test(f, REMOTE_URL, 'no-cors', 'include', 'no-cors', 'include');
-        fetch_test(f, REMOTE_URL, 'cors', 'omit', 'cors', 'omit');
-        fetch_test(f, REMOTE_URL, 'cors', 'same-origin', 'cors', 'same-origin');
-        fetch_test(f, REMOTE_URL, 'cors', 'include', 'cors', 'include');
+        await audio_test(f, LOCAL_URL, '', 'no-cors', 'include');
+        await audio_test(f, LOCAL_URL, 'anonymous', 'cors', 'same-origin');
+        await audio_test(f, LOCAL_URL, 'use-credentials', 'cors', 'include');
+        await audio_test(f, REMOTE_URL, '', 'no-cors', 'include');
+        await audio_test(f, REMOTE_URL, 'anonymous', 'cors', 'same-origin');
+        await audio_test(f, REMOTE_URL, 'use-credentials', 'cors', 'include');
 
-        audio_test(f, LOCAL_URL, '', 'no-cors', 'include');
-        audio_test(f, LOCAL_URL, 'anonymous', 'cors', 'same-origin');
-        audio_test(f, LOCAL_URL, 'use-credentials', 'cors', 'include');
-        audio_test(f, REMOTE_URL, '', 'no-cors', 'include');
-        audio_test(f, REMOTE_URL, 'anonymous', 'cors', 'same-origin');
-        audio_test(f, REMOTE_URL, 'use-credentials', 'cors', 'include');
-      })
-      .catch(unreached_rejection(t));
+        frame.remove();
+        service_worker_unregister(t, SCOPE);
+      }).catch(unreached_rejection(t));
   }, 'Verify FetchEvent for resources.');
 </script>
diff --git a/tests/wpt/web-platform-tests/service-workers/service-worker/request-end-to-end.https.html b/tests/wpt/web-platform-tests/service-workers/service-worker/request-end-to-end.https.html
index 7b594aac57d..a39ceadd9f3 100644
--- a/tests/wpt/web-platform-tests/service-workers/service-worker/request-end-to-end.https.html
+++ b/tests/wpt/web-platform-tests/service-workers/service-worker/request-end-to-end.https.html
@@ -23,9 +23,9 @@ promise_test(t => {
           assert_equals(result.method, 'GET', 'request.method');
           assert_equals(result.referrer, location.href, 'request.referrer');
           assert_equals(result.mode, 'navigate', 'request.mode');
-          assert_equals(result.request_construct_error, 'TypeError',
+          assert_equals(result.request_construct_error, '',
                         'Constructing a Request with a Request whose mode ' +
-                        'is navigate and non-empty RequestInit must throw a ' +
+                        'is navigate and non-empty RequestInit must not throw a ' +
                         'TypeError.')
           assert_equals(result.credentials, 'include', 'request.credentials');
           assert_equals(result.redirect, 'manual', 'request.redirect');
diff --git a/tests/wpt/web-platform-tests/service-workers/service-worker/resources/client-navigate-worker.js b/tests/wpt/web-platform-tests/service-workers/service-worker/resources/client-navigate-worker.js
index 09d11fe6181..aff2b37ae02 100644
--- a/tests/wpt/web-platform-tests/service-workers/service-worker/resources/client-navigate-worker.js
+++ b/tests/wpt/web-platform-tests/service-workers/service-worker/resources/client-navigate-worker.js
@@ -5,11 +5,6 @@ importScripts("testharness-helpers.js")
 
 self.onfetch = function(e) {
   if (e.request.url.indexOf("client-navigate-frame.html") >= 0) {
-    if (e.clientId === null) {
-      e.respondWith(fetch(e.request));
-    } else {
-      e.respondWith(Response.error());
-    }
     return;
   }
   e.respondWith(new Response(e.clientId));
diff --git a/tests/wpt/web-platform-tests/service-workers/service-worker/resources/fetch-access-control.py b/tests/wpt/web-platform-tests/service-workers/service-worker/resources/fetch-access-control.py
index c82ffbe0930..61b89cbd95b 100644
--- a/tests/wpt/web-platform-tests/service-workers/service-worker/resources/fetch-access-control.py
+++ b/tests/wpt/web-platform-tests/service-workers/service-worker/resources/fetch-access-control.py
@@ -36,6 +36,39 @@ def main(request, response):
     if "VIDEO" in request.GET:
         headers.append(("Content-Type", "video/webm"))
         body = open(os.path.join(request.doc_root, "media", "movie_5.ogv"), "rb").read()
+        length = len(body)
+        # If "PartialContent" is specified, the requestor wants to test range
+        # requests. For the initial request, respond with "206 Partial Content"
+        # and don't send the entire content. Then expect subsequent requests to
+        # have a "Range" header with a byte range. Respond with that range.
+        if "PartialContent" in request.GET:
+          if length < 1:
+            return 500, headers, "file is too small for range requests"
+          start = 0
+          end = length - 1
+          if "Range" in request.headers:
+            range_header = request.headers["Range"]
+            prefix = "bytes="
+            split_header = range_header[len(prefix):].split("-")
+            # The first request might be "bytes=0-". We want to force a range
+            # request, so just return the first byte.
+            if split_header[0] == "0" and split_header[1] == "":
+              end = start
+            # Otherwise, it is a range request. Respect the values sent.
+            if split_header[0] != "":
+              start = int(split_header[0])
+            if split_header[1] != "":
+              end = int(split_header[1])
+          else:
+            # The request doesn't have a range. Force a range request by
+            # returning the first byte.
+            end = start
+
+          headers.append(("Accept-Ranges", "bytes"))
+          headers.append(("Content-Length", str(end -start + 1)))
+          headers.append(("Content-Range", "bytes %d-%d/%d" % (start, end, length)))
+          chunk = body[start:(end + 1)]
+          return 206, headers, chunk
         return headers, body
 
     username = request.auth.username if request.auth.username else "undefined"
diff --git a/tests/wpt/web-platform-tests/service-workers/service-worker/resources/fetch-event-network-fallback-worker.js b/tests/wpt/web-platform-tests/service-workers/service-worker/resources/fetch-event-network-fallback-worker.js
new file mode 100644
index 00000000000..daa200c2bad
--- /dev/null
+++ b/tests/wpt/web-platform-tests/service-workers/service-worker/resources/fetch-event-network-fallback-worker.js
@@ -0,0 +1,3 @@
+self.addEventListener('fetch', () => {
+    // Do nothing.
+  });
diff --git a/tests/wpt/web-platform-tests/service-workers/service-worker/resources/fetch-event-respond-with-body-loaded-in-chunk-worker.js b/tests/wpt/web-platform-tests/service-workers/service-worker/resources/fetch-event-respond-with-body-loaded-in-chunk-worker.js
new file mode 100644
index 00000000000..d3ba8a8df2e
--- /dev/null
+++ b/tests/wpt/web-platform-tests/service-workers/service-worker/resources/fetch-event-respond-with-body-loaded-in-chunk-worker.js
@@ -0,0 +1,7 @@
+'use strict';
+
+self.addEventListener('fetch', event => {
+    if (!event.request.url.match(/body-in-chunk$/))
+        return;
+    event.respondWith(fetch("../../../fetch/api/resources/trickle.py?count=4&delay=50"));
+});
diff --git a/tests/wpt/web-platform-tests/service-workers/service-worker/resources/fetch-event-respond-with-readable-stream-chunk-worker.js b/tests/wpt/web-platform-tests/service-workers/service-worker/resources/fetch-event-respond-with-readable-stream-chunk-worker.js
new file mode 100644
index 00000000000..f954e3a18a5
--- /dev/null
+++ b/tests/wpt/web-platform-tests/service-workers/service-worker/resources/fetch-event-respond-with-readable-stream-chunk-worker.js
@@ -0,0 +1,40 @@
+'use strict';
+
+self.addEventListener('fetch', event => {
+    if (!event.request.url.match(/body-stream$/))
+        return;
+
+    var counter = 0;
+    const encoder = new TextEncoder();
+    const stream = new ReadableStream({ pull: controller => {
+        switch (++counter) {
+        case 1:
+            controller.enqueue(encoder.encode(''));
+            return;
+        case 2:
+            controller.enqueue(encoder.encode('chunk #1'));
+            return;
+        case 3:
+            controller.enqueue(encoder.encode(' '));
+            return;
+        case 4:
+            controller.enqueue(encoder.encode('chunk #2'));
+            return;
+        case 5:
+            controller.enqueue(encoder.encode(' '));
+            return;
+        case 6:
+            controller.enqueue(encoder.encode('chunk #3'));
+            return;
+        case 7:
+            controller.enqueue(encoder.encode(' '));
+            return;
+        case 8:
+            controller.enqueue(encoder.encode('chunk #4'));
+            return;
+        default:
+            controller.close();
+        }
+    }});
+    event.respondWith(new Response(stream));
+});
diff --git a/tests/wpt/web-platform-tests/service-workers/service-worker/resources/fetch-request-xhr-iframe.https.html b/tests/wpt/web-platform-tests/service-workers/service-worker/resources/fetch-request-xhr-iframe.https.html
index 867bf2385de..ab3e2a1280b 100644
--- a/tests/wpt/web-platform-tests/service-workers/service-worker/resources/fetch-request-xhr-iframe.https.html
+++ b/tests/wpt/web-platform-tests/service-workers/service-worker/resources/fetch-request-xhr-iframe.https.html
@@ -179,7 +179,7 @@ function form_data_test() {
           '\r\n' +
           'file content\r\n' +
           '--' + boundary + '--\r\n';
-        assert_equals(response.body, expected_body);
+        assert_true(response.body === expected_body, "form data response content is as expected");
       });
 }
 
diff --git a/tests/wpt/web-platform-tests/service-workers/service-worker/resources/range-request-to-different-origins-worker.js b/tests/wpt/web-platform-tests/service-workers/service-worker/resources/range-request-to-different-origins-worker.js
new file mode 100644
index 00000000000..cab60583390
--- /dev/null
+++ b/tests/wpt/web-platform-tests/service-workers/service-worker/resources/range-request-to-different-origins-worker.js
@@ -0,0 +1,40 @@
+// This worker is meant to test range requests where the responses come from
+// multiple origins. It forwards the first request to a cross-origin URL
+// (generating an opaque response). The server is expected to return a 206
+// Partial Content response.  Then the worker lets subsequent range requests
+// fall back to network (generating same-origin responses). The intent is to try
+// to trick the browser into treating the resource as same-origin.
+//
+// It would also be interesting to do the reverse test where the first request
+// goes to the same-origin URL, and subsequent range requests go cross-origin in
+// 'no-cors' mode to receive opaque responses. But the service worker cannot do
+// this, because in 'no-cors' mode the 'range' HTTP header is disallowed.
+
+importScripts('/common/get-host-info.sub.js')
+
+let initial = true;
+function is_initial_request() {
+  const old = initial;
+  initial = false;
+  return old;
+}
+
+self.addEventListener('fetch', e => {
+    const url = new URL(e.request.url);
+    if (url.search.indexOf('VIDEO') == -1) {
+      // Fall back for non-video.
+      return;
+    }
+
+    // Make the first request go cross-origin.
+    if (is_initial_request()) {
+      const cross_origin_url = get_host_info().HTTPS_REMOTE_ORIGIN +
+          url.pathname + url.search;
+      const cross_origin_request = new Request(cross_origin_url,
+          {mode: 'no-cors', headers: e.request.headers});
+      e.respondWith(fetch(cross_origin_request));
+      return;
+    }
+
+    // Fall back to same origin for subsequent range requests.
+  });
diff --git a/tests/wpt/web-platform-tests/service-workers/service-worker/resources/range-request-with-different-cors-modes-worker.js b/tests/wpt/web-platform-tests/service-workers/service-worker/resources/range-request-with-different-cors-modes-worker.js
new file mode 100644
index 00000000000..7580b0b68a9
--- /dev/null
+++ b/tests/wpt/web-platform-tests/service-workers/service-worker/resources/range-request-with-different-cors-modes-worker.js
@@ -0,0 +1,60 @@
+// This worker is meant to test range requests where the responses are a mix of
+// opaque ones and non-opaque ones. It forwards the first request to a
+// cross-origin URL (generating an opaque response). The server is expected to
+// return a 206 Partial Content response.  Then the worker forwards subsequent
+// range requests to that URL, with CORS sharing generating a non-opaque
+// responses. The intent is to try to trick the browser into treating the
+// resource as non-opaque.
+//
+// It would also be interesting to do the reverse test where the first request
+// uses 'cors', and subsequent range requests use 'no-cors' mode. But the
+// service worker cannot do this, because in 'no-cors' mode the 'range' HTTP
+// header is disallowed.
+
+importScripts('/common/get-host-info.sub.js')
+
+let initial = true;
+function is_initial_request() {
+  const old = initial;
+  initial = false;
+  return old;
+}
+
+self.addEventListener('fetch', e => {
+    const url = new URL(e.request.url);
+    if (url.search.indexOf('VIDEO') == -1) {
+      // Fall back for non-video.
+      return;
+    }
+
+    let cross_origin_url = get_host_info().HTTPS_REMOTE_ORIGIN +
+        url.pathname + url.search;
+
+    // The first request is no-cors.
+    if (is_initial_request()) {
+      const init = { mode: 'no-cors', headers: e.request.headers };
+      const cross_origin_request = new Request(cross_origin_url, init);
+      e.respondWith(fetch(cross_origin_request));
+      return;
+    }
+
+    // Subsequent range requests are cors.
+
+    // Copy headers needed for range requests.
+    let my_headers = new Headers;
+    if (e.request.headers.get('accept'))
+      my_headers.append('accept', e.request.headers.get('accept'));
+    if (e.request.headers.get('range'))
+    my_headers.append('range', e.request.headers.get('range'));
+
+    // Add &ACAOrigin to allow CORS.
+    cross_origin_url += '&ACAOrigin=' + get_host_info().HTTPS_ORIGIN;
+    // Add &ACAHeaders to allow range requests.
+    cross_origin_url += '&ACAHeaders=accept,range';
+
+    // Make the CORS request.
+    const init = { mode: 'cors', headers: my_headers };
+    const cross_origin_request = new Request(cross_origin_url, init);
+    e.respondWith(fetch(cross_origin_request));
+  });
+
diff --git a/tests/wpt/web-platform-tests/service-workers/service-worker/resources/register-closed-window-iframe.html b/tests/wpt/web-platform-tests/service-workers/service-worker/resources/register-closed-window-iframe.html
index ed743ea056e..117f25477b0 100644
--- a/tests/wpt/web-platform-tests/service-workers/service-worker/resources/register-closed-window-iframe.html
+++ b/tests/wpt/web-platform-tests/service-workers/service-worker/resources/register-closed-window-iframe.html
@@ -1,14 +1,17 @@
 <html>
 <head>
 <script>
-window.addEventListener('message', function(evt) {
+window.addEventListener('message', async function(evt) {
   if (evt.data === 'START') {
     var w = window.open('./');
     var sw = w.navigator.serviceWorker;
     w.close();
     w = null;
-    sw.register('doesntmatter.js');
-    parent.postMessage('OK', '*');
+    try {
+      await sw.register('doesntmatter.js');
+    } finally {
+      parent.postMessage('OK', '*');
+    }
   }
 });
 </script>
diff --git a/tests/wpt/web-platform-tests/svg/path/distance/pathLength-positive-percentage.svg b/tests/wpt/web-platform-tests/svg/path/distance/pathLength-positive-percentage.svg
new file mode 100644
index 00000000000..d8e28b0889d
--- /dev/null
+++ b/tests/wpt/web-platform-tests/svg/path/distance/pathLength-positive-percentage.svg
@@ -0,0 +1,36 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:h="http://www.w3.org/1999/xhtml"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     width="300" height="200" viewBox="0 0 300 200"
+     font-family="sans-serif" font-size="28">
+  <metadata>
+    <h:link rel="help" href="https://svgwg.org/svg2-draft/paths.html#PathLengthAttribute"/>
+    <h:link rel="match" href="pathLength-positive-ref.svg"/>
+    <h:meta name="assert" content="pathLength scales distance along the path"/>
+  </metadata>
+
+  <defs>
+    <path id="track" stroke="lightblue" fill="none" d="M 50 50 h 200" pathLength="2"/>
+  </defs>
+
+  <g>
+    <use xlink:href="#track"/>
+    <text>
+      <textPath xlink:href="#track" startOffset="0%">The quick brown fox</textPath>
+    </text>
+  </g>
+
+  <g transform="translate(0,50)">
+    <use xlink:href="#track"/>
+    <text>
+      <textPath xlink:href="#track" startOffset="50%">The quick brown fox</textPath>
+    </text>
+  </g>
+
+  <g transform="translate(0,100)">
+    <use xlink:href="#track"/>
+    <text>
+      <textPath xlink:href="#track" startOffset="-50%">The quick brown fox</textPath>
+    </text>
+  </g>
+</svg>
diff --git a/tests/wpt/web-platform-tests/svg/path/distance/pathLength-zero-percentage-ref.svg b/tests/wpt/web-platform-tests/svg/path/distance/pathLength-zero-percentage-ref.svg
new file mode 100644
index 00000000000..dca91c1b5fc
--- /dev/null
+++ b/tests/wpt/web-platform-tests/svg/path/distance/pathLength-zero-percentage-ref.svg
@@ -0,0 +1,30 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     width="300" height="200" viewBox="0 0 300 200"
+     font-family="sans-serif" font-size="28">
+  <defs>
+    <path id="track" stroke="lightblue" fill="none" d="M 50 50 h 200"/>
+  </defs>
+
+  <g>
+    <use xlink:href="#track"/>
+    <text>
+      <textPath xlink:href="#track">The quick brown fox</textPath>
+    </text>
+  </g>
+
+  <g transform="translate(0,50)">
+    <use xlink:href="#track"/>
+    <text>
+      <textPath xlink:href="#track">The quick brown fox</textPath>
+    </text>
+  </g>
+
+  <g transform="translate(0,100)">
+    <use xlink:href="#track"/>
+    <text>
+      <textPath xlink:href="#track">The quick brown fox</textPath>
+    </text>
+  </g>
+</svg>
+
diff --git a/tests/wpt/web-platform-tests/svg/path/distance/pathLength-zero-percentage.svg b/tests/wpt/web-platform-tests/svg/path/distance/pathLength-zero-percentage.svg
new file mode 100644
index 00000000000..24213e443d0
--- /dev/null
+++ b/tests/wpt/web-platform-tests/svg/path/distance/pathLength-zero-percentage.svg
@@ -0,0 +1,36 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:h="http://www.w3.org/1999/xhtml"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     width="300" height="200" viewBox="0 0 300 200"
+     font-family="sans-serif" font-size="28">
+  <metadata>
+    <h:link rel="help" href="https://svgwg.org/svg2-draft/paths.html#PathLengthAttribute"/>
+    <h:link rel="match" href="pathLength-zero-percentage-ref.svg"/>
+    <h:meta name="assert" content="A value of zero is valid and must be treated as a scaling factor of infinity."/>
+  </metadata>
+
+  <defs>
+    <path id="track" stroke="lightblue" fill="none" d="M 50 50 h 200" pathLength="0"/>
+  </defs>
+
+  <g>
+    <use xlink:href="#track"/>
+    <text>
+      <textPath xlink:href="#track" startOffset="0%">The quick brown fox</textPath>
+    </text>
+  </g>
+
+  <g transform="translate(0,50)">
+    <use xlink:href="#track"/>
+    <text>
+      <textPath xlink:href="#track" startOffset="50%">The quick brown fox</textPath>
+    </text>
+  </g>
+
+  <g transform="translate(0,100)">
+    <use xlink:href="#track"/>
+    <text>
+      <textPath xlink:href="#track" startOffset="-50%">The quick brown fox</textPath>
+    </text>
+  </g>
+</svg>
diff --git a/tests/wpt/web-platform-tests/tools/wpt/browser.py b/tests/wpt/web-platform-tests/tools/wpt/browser.py
index c6cc38afd67..ef3b7d6694b 100644
--- a/tests/wpt/web-platform-tests/tools/wpt/browser.py
+++ b/tests/wpt/web-platform-tests/tools/wpt/browser.py
@@ -281,6 +281,7 @@ class Chrome(Browser):
                 logger.critical("dbus not running and can't be started")
                 sys.exit(1)
 
+
 class ChromeAndroid(Browser):
     """Chrome-specific interface for android.
 
@@ -293,49 +294,16 @@ class ChromeAndroid(Browser):
     def install(self, dest=None):
         raise NotImplementedError
 
-    def platform_string(self):
-        raise NotImplementedError
-
     def find_webdriver(self):
         return find_executable("chromedriver")
 
     def install_webdriver(self, dest=None):
-        """Install latest Webdriver."""
-        if dest is None:
-            dest = os.pwd
-        latest = get("http://chromedriver.storage.googleapis.com/LATEST_RELEASE").text.strip()
-        url = "http://chromedriver.storage.googleapis.com/%s/chromedriver_%s.zip" % (latest,
-                                                                                     self.platform_string())
-        unzip(get(url).raw, dest)
-
-        path = find_executable("chromedriver", dest)
-        st = os.stat(path)
-        os.chmod(path, st.st_mode | stat.S_IEXEC)
-        return path
+        chrome = Chrome()
+        return chrome.install_webdriver(dest)
 
     def version(self, root):
         raise NotImplementedError
 
-    def prepare_environment(self):
-        # https://bugs.chromium.org/p/chromium/issues/detail?id=713947
-        logger.debug("DBUS_SESSION_BUS_ADDRESS %s" % os.environ.get("DBUS_SESSION_BUS_ADDRESS"))
-        if "DBUS_SESSION_BUS_ADDRESS" not in os.environ:
-            if find_executable("dbus-launch"):
-                logger.debug("Attempting to start dbus")
-                dbus_conf = subprocess.check_output(["dbus-launch"])
-                logger.debug(dbus_conf)
-
-                # From dbus-launch(1):
-                #
-                # > When dbus-launch prints bus information to standard output,
-                # > by default it is in a simple key-value pairs format.
-                for line in dbus_conf.strip().split("\n"):
-                    key, _, value = line.partition("=")
-                    os.environ[key] = value
-            else:
-                logger.critical("dbus not running and can't be started")
-                sys.exit(1)
-
 
 class Opera(Browser):
     """Opera-specific interface.
diff --git a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/browsers/chrome_android.py b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/browsers/chrome_android.py
index 9e53bc660e2..47090be0439 100644
--- a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/browsers/chrome_android.py
+++ b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/browsers/chrome_android.py
@@ -1,3 +1,6 @@
+import subprocess
+
+from ..config import *
 from .base import Browser, ExecutorBrowser, require_arg
 from ..webdriver_server import ChromeDriverServer
 from ..executors import executor_kwargs as base_executor_kwargs
@@ -17,6 +20,8 @@ __wptrunner__ = {"product": "chrome_android",
                  "env_extras": "env_extras",
                  "env_options": "env_options"}
 
+_wptserve_ports = set()
+
 
 def check_args(**kwargs):
     require_arg(kwargs, "webdriver_binary")
@@ -32,13 +37,19 @@ def executor_kwargs(test_type, server_config, cache_manager, run_info_data,
                     **kwargs):
     from selenium.webdriver import DesiredCapabilities
 
+    # Use extend() to modify the global list in place.
+    _wptserve_ports.update(set(
+        server_config['ports']['http'] + server_config['ports']['https'] +
+        server_config['ports']['ws'] + server_config['ports']['wss']
+    ))
+
     executor_kwargs = base_executor_kwargs(test_type, server_config,
                                            cache_manager, **kwargs)
     executor_kwargs["close_after_done"] = True
     capabilities = dict(DesiredCapabilities.CHROME.items())
     capabilities["chromeOptions"] = {}
     # required to start on mobile
-    capabilities["chromeOptions"]["androidPackage"] = "com.android.chrome"
+    capabilities["chromeOptions"]["androidPackage"] = "com.google.android.apps.chrome"
 
     for (kwarg, capability) in [("binary", "binary"), ("binary_args", "args")]:
         if kwargs[kwarg] is not None:
@@ -76,6 +87,17 @@ class ChromeAndroidBrowser(Browser):
                                          binary=webdriver_binary,
                                          args=webdriver_args)
 
+    def _adb_run(self, args):
+        self.logger.info('adb ' + ' '.join(args))
+        subprocess.check_call(['adb'] + args)
+
+    def setup(self):
+        self._adb_run(['wait-for-device'])
+        self._adb_run(['forward', '--remove-all'])
+        self._adb_run(['reverse', '--remove-all'])
+        for port in _wptserve_ports:
+            self._adb_run(['reverse', 'tcp:%d' % port, 'tcp:%d' % port])
+
     def start(self, **kwargs):
         self.server.start(block=False)
 
@@ -93,6 +115,8 @@ class ChromeAndroidBrowser(Browser):
 
     def cleanup(self):
         self.stop()
+        self._adb_run(['forward', '--remove-all'])
+        self._adb_run(['reverse', '--remove-all'])
 
     def executor_browser(self):
         return ExecutorBrowser, {"webdriver_url": self.server.url}
diff --git a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/testrunner.py b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/testrunner.py
index 85ffbe3741a..16623f76867 100644
--- a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/testrunner.py
+++ b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/testrunner.py
@@ -229,7 +229,6 @@ class BrowserManager(object):
     def cleanup(self):
         if self.init_timer is not None:
             self.init_timer.cancel()
-        self.browser.cleanup()
 
     def check_for_crashes(self):
         self.browser.check_for_crashes()
diff --git a/tests/wpt/web-platform-tests/web-animations/animation-model/animation-types/property-list.js b/tests/wpt/web-platform-tests/web-animations/animation-model/animation-types/property-list.js
index 4b917957f7f..400e12dba9d 100644
--- a/tests/wpt/web-platform-tests/web-animations/animation-model/animation-types/property-list.js
+++ b/tests/wpt/web-platform-tests/web-animations/animation-model/animation-types/property-list.js
@@ -1405,6 +1405,25 @@ const gCSSProperties = {
       { type: 'discrete', options: [ [ 'flat', 'preserve-3d' ] ] }
     ]
   },
+  'rotate': {
+    // https://drafts.csswg.org/css-transforms-2/#individual-transforms
+    types: [ 'rotateList' ]
+  },
+  'translate': {
+    // https://drafts.csswg.org/css-transforms-2/#individual-transforms
+    types: [ 'translateList' ],
+    setup: t => {
+      // We need to set a width/height for resolving percentages against.
+      const element = createElement(t);
+      element.style.width = '100px';
+      element.style.height = '100px';
+      return element;
+    }
+  },
+  'scale': {
+    // https://drafts.csswg.org/css-transforms-2/#individual-transforms
+    types: [ 'scaleList' ]
+  },
   'unicode-bidi': {
     // https://drafts.csswg.org/css-writing-modes-3/#propdef-unicode-bidi
     types: [
@@ -1519,6 +1538,18 @@ function testAnimationSampleMatrices(animation, idlName, testSamples) {
   }
 }
 
+function testAnimationSampleRotate3d(animation, idlName, testSamples) {
+  const target = animation.effect.target;
+  for (const testSample of testSamples) {
+    animation.currentTime = testSample.time;
+    const actual = getComputedStyle(target)[idlName];
+    const expected = testSample.expected;
+    assert_rotate3d_equals(actual, expected,
+                         `The value should be ${expected} at`
+                         + ` ${testSample.time}ms but got ${actual}`);
+  }
+}
+
 function createTestElement(t, setup) {
   return setup ? setup(t) : createElement(t);
 }
diff --git a/tests/wpt/web-platform-tests/web-animations/animation-model/animation-types/property-types.js b/tests/wpt/web-platform-tests/web-animations/animation-model/animation-types/property-types.js
index eb9c8c163a1..2849b08c306 100644
--- a/tests/wpt/web-platform-tests/web-animations/animation-model/animation-types/property-types.js
+++ b/tests/wpt/web-platform-tests/web-animations/animation-model/animation-types/property-types.js
@@ -1583,6 +1583,382 @@ const transformListType = {
   },
 };
 
+const rotateListType = {
+  testInterpolation: (property, setup) => {
+    test(t => {
+      const idlName = propertyToIDL(property);
+      const target = createTestElement(t, setup);
+      const animation = target.animate(
+        {
+          [idlName]: ['45deg', '135deg'],
+        },
+        1000
+      );
+
+      testAnimationSamples(animation, idlName,
+        [{ time: 500,  expected: '90deg' }]);
+    }, `${property} without rotation axes`);
+
+    test(t => {
+      const idlName = propertyToIDL(property);
+      const target = createTestElement(t, setup);
+      const animation =
+        target.animate({ [idlName]: [ '0 1 0 0deg',
+                                      '0 1 0 90deg'] },
+                       1000);
+
+      testAnimationSamples(animation, idlName,
+        [{ time: 500, expected: '0 1 0 45deg' }]);
+    }, `${property} with rotation axes`);
+
+    test(t => {
+      const idlName = propertyToIDL(property);
+      const target = createTestElement(t, setup);
+
+      const animation =
+        target.animate({ [idlName]: [ '0 1 0 0deg',
+                                      '0 1 0 720deg'] },
+                       1000);
+
+      testAnimationSamples(animation, idlName,
+        [{ time: 250, expected: '0 1 0 180deg' }]);
+    }, `${property} with rotation axes and range over 360 degrees`);
+
+    test(t => {
+      const idlName = propertyToIDL(property);
+      const target = createTestElement(t, setup);
+      const animation =
+        target.animate({ [idlName]: [ '0 1 0 0deg',
+                                      '0 1 1 90deg'] },
+                       1000);
+
+      testAnimationSampleRotate3d(animation, idlName,
+        [{ time: 500, expected: '0 0.707107 0.707107 45deg' }]);
+    }, `${property} with different rotation axes`);
+  },
+  testAddition: function(property, setup) {
+    test(t => {
+      const idlName = propertyToIDL(property);
+      const target = createTestElement(t, setup);
+      target.style[idlName] = '45deg';
+      const animation = target.animate({ [idlName]: ['-90deg', '90deg'] },
+                                       { duration: 1000, fill: 'both',
+                                         composite: 'add' });
+
+      testAnimationSamples(animation, idlName,
+        [{ time: 0,    expected: '-45deg' },
+         { time: 1000, expected: '135deg' }]);
+    }, `${property} without rotation axes`);
+
+    test(t => {
+      const idlName = propertyToIDL(property);
+      const target = createTestElement(t, setup);
+      // Rotation specified in transform property should not affect the computed
+      // value of |property|.
+      target.style.transform = 'rotate(20deg)';
+      target.style[idlName] = '0 1 0 -45deg';
+      const animation =
+        target.animate({ [idlName]: ['0 1 0 90deg',
+                                     '0 1 0 180deg'] },
+                       { duration: 1000, fill: 'both', composite: 'add' });
+
+      testAnimationSamples(animation, idlName,
+        [{ time: 0,    expected: '0 1 0 45deg' },
+         { time: 1000, expected: '0 1 0 135deg' }]);
+    }, `${property} with underlying transform`);
+
+    test(t => {
+      const idlName = propertyToIDL(property);
+      const target = createTestElement(t, setup);
+      const animation =
+        target.animate({ [idlName]: [ '0 1 0 0deg',
+                                      '1 1 1 270deg'] },
+                       { duration: 1000, fill: 'both', composite: 'add' });
+
+      testAnimationSampleRotate3d(animation, idlName,
+        [{ time: 500, expected: '0.57735 0.57735 0.57735 135deg' }]);
+    }, `${property} with different rotation axes`);
+  },
+  testAccumulation: function(property, setup) {
+    test(t => {
+      const idlName = propertyToIDL(property);
+      const target = createTestElement(t, setup);
+      target.style[idlName] = '45deg';
+      const animation = target.animate({ [idlName]: ['-90deg', '90deg'] },
+                                     { duration: 1000, fill: 'both',
+                                       composite: 'accumulate' });
+
+      testAnimationSamples(animation, idlName,
+        [{ time: 0,    expected: '-45deg' },
+         { time: 1000, expected: '135deg' }]);
+    }, `${property} without rotation axes`);
+
+    test(t => {
+      const idlName = propertyToIDL(property);
+      const target = createTestElement(t, setup);
+      target.style.transform = 'translateX(100px)';
+      target.style[idlName] = '1 0 0 -45deg';
+      const animation =
+        target.animate({ [idlName]: ['1 0 0 90deg',
+                                     '1 0 0 180deg'] },
+                       { duration: 1000, fill: 'both', composite: 'accumulate' });
+
+      testAnimationSamples(animation, idlName,
+        [{ time: 0,    expected: '1 0 0 45deg' },
+         { time: 1000, expected: '1 0 0 135deg' }]);
+    }, `${property} with underlying transform`);
+
+    test(t => {
+      const idlName = propertyToIDL(property);
+      const target = createTestElement(t, setup);
+      const animation =
+        target.animate({ [idlName]: [ '0 1 0 0deg',
+                                      '1 0 1 180deg'] },
+                       { duration: 1000, fill: 'both', composite: 'accumulate' });
+
+      testAnimationSampleRotate3d(animation, idlName,
+        [{ time: 500, expected: '0.707107 0 0.707107 90deg' }]);
+    }, `${property} with different rotation axes`);
+  },
+};
+
+const translateListType = {
+  testInterpolation: (property, setup) => {
+    test(t => {
+      const idlName = propertyToIDL(property);
+      const target = createTestElement(t, setup);
+      const animation = target.animate(
+        {
+          [idlName]: ['200px', '400px'],
+        },
+        1000
+      );
+      testAnimationSamples(animation, idlName,
+        [{ time: 500,  expected: '300px' }]);
+    }, `${property} with two unspecified values`);
+
+    test(t => {
+      const idlName = propertyToIDL(property);
+      const target = createTestElement(t, setup);
+      const animation = target.animate(
+        {
+          [idlName]: ['200px -200px', '400px 400px'],
+        },
+        1000
+      );
+      testAnimationSamples(animation, idlName,
+        [{ time: 500,  expected: '300px 100px' }]);
+    }, `${property} with one unspecified value`);
+
+    test(t => {
+      const idlName = propertyToIDL(property);
+      const target = createTestElement(t, setup);
+      const animation = target.animate(
+        {
+          [idlName]: ['200px -200px 600px', '400px 400px -200px'],
+        },
+        1000
+      );
+      testAnimationSamples(animation, idlName,
+        [{ time: 500,  expected: '300px 100px 200px' }]);
+    }, `${property} with all three values specified`);
+
+    test(t => {
+      const idlName = propertyToIDL(property);
+      const target = createTestElement(t, setup);
+      const animation = target.animate(
+        {
+          [idlName]: ['0% -101px 600px', '400px 50% -200px'],
+        },
+        1000
+      );
+      testAnimationSamples(animation, idlName,
+        [{ time: 500,  expected: '200px -25.5px 200px' }]);
+    }, `${property} with combination of percentages and lengths`);
+  },
+  testAddition: function(property, setup) {
+    test(t => {
+      const idlName = propertyToIDL(property);
+      const target = createTestElement(t, setup);
+      target.style[idlName] = '100px';
+      const animation = target.animate({ [idlName]: ['-200px', '500px'] },
+                                       { duration: 1000, fill: 'both',
+                                         composite: 'add' });
+      testAnimationSamples(animation, idlName,
+        [ { time: 0,    expected: '-100px' },
+          { time: 1000, expected: '600px' }]);
+
+    }, `${property}`);
+
+    test(t => {
+      const idlName = propertyToIDL(property);
+      const target = createTestElement(t, setup);
+      target.transform = 'translateY(100px)';
+      target.style[idlName] = '100px';
+      const animation = target.animate({ [idlName]: ['-200px', '500px'] },
+                                       { duration: 1000, fill: 'both',
+                                         composite: 'add' });
+      testAnimationSamples(animation, idlName,
+        [ { time: 0,    expected: '-100px' },
+          { time: 1000, expected: '600px' }]);
+
+    }, `${property} with underlying transform`);
+
+    test(t => {
+      const idlName = propertyToIDL(property);
+      const target = createTestElement(t, setup);
+      target.style[idlName] = '50%';
+      const animation = target.animate({ [idlName]: ['-200px', '500px'] },
+                                       { duration: 1000, fill: 'both',
+                                         composite: 'add' });
+      testAnimationSamples(animation, idlName,
+        [ { time: 0,    expected: '-150px' },
+          { time: 1000, expected: '550px' }]);
+
+    }, `${property} with underlying percentage value`);
+  },
+  testAccumulation: function(property, setup) {
+    test(t => {
+      const idlName = propertyToIDL(property);
+      const target = createTestElement(t, setup);
+      target.style[idlName] = '100px';
+      const animation = target.animate({ [idlName]: ['-200px', '500px'] },
+                                     { duration: 1000, fill: 'both',
+                                       composite: 'accumulate' });
+      testAnimationSamples(animation, idlName,
+        [ { time: 0,    expected: '-100px' },
+          { time: 1000, expected: '600px' }]);
+    }, `${property}`);
+
+    test(t => {
+      const idlName = propertyToIDL(property);
+      const target = createTestElement(t, setup);
+      target.transform = 'translateY(100px)';
+      target.style[idlName] = '100px';
+      const animation = target.animate({ [idlName]: ['-200px', '500px'] },
+                                     { duration: 1000, fill: 'both',
+                                       composite: 'accumulate' });
+      testAnimationSamples(animation, idlName,
+        [ { time: 0,    expected: '-100px' },
+          { time: 1000, expected: '600px' }]);
+    }, `${property} with transform`);
+  },
+};
+
+const scaleListType = {
+  testInterpolation: (property, setup) => {
+    test(t => {
+      const idlName = propertyToIDL(property);
+      const target = createTestElement(t, setup);
+      const animation = target.animate({ [idlName]: ['3', '5'] },
+                                       1000);
+
+      testAnimationSamples(animation, idlName,
+        [{ time: 500,  expected: '4' }]);
+    }, `${property} with two unspecified values`);
+
+    test(t => {
+      const idlName = propertyToIDL(property);
+      const target = createTestElement(t, setup);
+      const animation = target.animate({ [idlName]: ['3 3', '5 5'] },
+                                       1000);
+
+      testAnimationSamples(animation, idlName,
+        [{ time: 500,  expected: '4 4' }]);
+    }, `${property} with one unspecified value`);
+
+    test(t => {
+      const idlName = propertyToIDL(property);
+      const target = createTestElement(t, setup);
+      const animation = target.animate({ [idlName]: ['3 3 3', '5 5 5'] },
+                                       1000);
+
+      testAnimationSamples(animation, idlName,
+        [{ time: 500,  expected: '4 4 4' }]);
+    }, `${property}`);
+  },
+  testAddition: function(property, setup) {
+    test(t => {
+      const idlName = propertyToIDL(property);
+      const target = createTestElement(t, setup);
+      target.style[idlName] = '2';
+      const animation = target.animate({ [idlName]: ['-3', '5'] },
+                                       { duration: 1000, fill: 'both',
+                                         composite: 'add' });
+
+      testAnimationSamples(animation, idlName,
+        [{ time: 0,    expected: '-6' },
+         { time: 1000, expected: '10' }]);
+    }, `${property} with two unspecified values`);
+
+    test(t => {
+      const idlName = propertyToIDL(property);
+      const target = createTestElement(t, setup);
+      target.style[idlName] = '2 2';
+      const animation = target.animate({ [idlName]: ['-3 -3', '5 5'] },
+                                       { duration: 1000, fill: 'both',
+                                         composite: 'add' });
+
+      testAnimationSamples(animation, idlName,
+        [{ time: 0,    expected: '-6 -6' },
+         { time: 1000, expected: '10 10' }]);
+    }, `${property} with one unspecified value`);
+
+    test(t => {
+      const idlName = propertyToIDL(property);
+      const target = createTestElement(t, setup);
+      target.style[idlName] = '2 2 2';
+      const animation = target.animate({ [idlName]: ['-1 -2 -3', '4 5 6'] },
+                                       { duration: 1000, fill: 'both',
+                                         composite: 'add' });
+
+      testAnimationSamples(animation, idlName,
+        [{ time: 0,    expected: '-2 -4 -6' },
+         { time: 1000, expected: '8 10 12' }]);
+    }, `${property}`);
+  },
+  testAccumulation: function(property, setup) {
+    test(t => {
+      const idlName = propertyToIDL(property);
+      const target = createTestElement(t, setup);
+      target.style[idlName] = '2';
+      const animation = target.animate({ [idlName]: ['-3', '5'] },
+                                     { duration: 1000, fill: 'both',
+                                       composite: 'accumulate' });
+
+      testAnimationSamples(animation, idlName,
+        [{ time: 0,    expected: '-2' },
+         { time: 1000, expected: '6' }]);
+    }, `${property} with two unspecified values`);
+
+    test(t => {
+      const idlName = propertyToIDL(property);
+      const target = createTestElement(t, setup);
+      target.style[idlName] = '2 2';
+      const animation = target.animate({ [idlName]: ['-3 -3', '5 5'] },
+                                     { duration: 1000, fill: 'both',
+                                       composite: 'accumulate' });
+
+      testAnimationSamples(animation, idlName,
+        [{ time: 0,    expected: '-2 -2' },
+         { time: 1000, expected: '6 6' }]);
+    }, `${property} with one unspecified value`);
+
+    test(t => {
+      const idlName = propertyToIDL(property);
+      const target = createTestElement(t, setup);
+      target.style[idlName] = '2 2 2';
+      const animation = target.animate({ [idlName]: ['-1 -2 -3', '4 5 6'] },
+                                     { duration: 1000, fill: 'both',
+                                       composite: 'accumulate' });
+
+      testAnimationSamples(animation, idlName,
+        [{ time: 0,    expected: '0 -1 -2' },
+         { time: 1000, expected: '5 6 7' }]);
+    }, `${property}`);
+  },
+};
+
 const filterListType = {
   testInterpolation: (property, setup) => {
     test(t => {
@@ -2316,6 +2692,9 @@ const types = {
   positiveNumber: positiveNumberType,
   opacity: opacityType,
   transformList: transformListType,
+  rotateList: rotateListType,
+  translateList: translateListType,
+  scaleList: scaleListType,
   visibility: visibilityType,
   boxShadowList: boxShadowListType,
   textShadowList: textShadowListType,
diff --git a/tests/wpt/web-platform-tests/web-animations/testcommon.js b/tests/wpt/web-platform-tests/web-animations/testcommon.js
index be3827fd5d8..bb5acc2869f 100644
--- a/tests/wpt/web-platform-tests/web-animations/testcommon.js
+++ b/tests/wpt/web-platform-tests/web-animations/testcommon.js
@@ -262,3 +262,25 @@ function assert_matrix_equals(actual, expected, description) {
       `expected ${expected} but got ${actual}: ${description}`);
   }
 }
+
+// Compare rotate3d vector like '0 1 0 45deg' with tolerances.
+function assert_rotate3d_equals(actual, expected, description) {
+  const rotationRegExp =/^((([+-]?\d+(\.+\d+)?\s){3})?\d+(\.+\d+)?)deg/;
+
+  assert_regexp_match(actual, rotationRegExp,
+    'Actual value is not a rotate3d vector')
+  assert_regexp_match(expected, rotationRegExp,
+    'Expected value is not a rotate3d vector');
+
+  const actualRotationVector =
+    actual.match(rotationRegExp)[1].split(' ').map(Number);
+  const expectedRotationVector =
+    expected.match(rotationRegExp)[1].split(' ').map(Number);
+
+  assert_equals(actualRotationVector.length, expectedRotationVector.length,
+    `dimension of the matrix: ${description}`);
+  for (let i = 0; i < actualRotationVector.length; i++) {
+    assert_approx_equals(actualRotationVector[i], expectedRotationVector[i], 0.0001,
+      `expected ${expected} but got ${actual}: ${description}`);
+  }
+}
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/webaudio/resources/stereopanner-testing.js b/tests/wpt/web-platform-tests/webaudio/resources/stereopanner-testing.js
new file mode 100644
index 00000000000..d6238a9cd36
--- /dev/null
+++ b/tests/wpt/web-platform-tests/webaudio/resources/stereopanner-testing.js
@@ -0,0 +1,203 @@
+let StereoPannerTest = (function() {
+
+  // Constants
+  let PI_OVER_TWO = Math.PI * 0.5;
+
+  let gSampleRate = 44100;
+
+  // Time step when each panner node starts.
+  let gTimeStep = 0.001;
+
+  // How many panner nodes to create for the test
+  let gNodesToCreate = 100;
+
+  // Total render length for all of our nodes.
+  let gRenderLength = gTimeStep * (gNodesToCreate + 1) + gSampleRate;
+
+  // Calculates channel gains based on equal power panning model.
+  // See: http://webaudio.github.io/web-audio-api/#panning-algorithm
+  function getChannelGain(pan, numberOfChannels) {
+    // The internal panning clips the pan value between -1, 1.
+    pan = Math.min(Math.max(pan, -1), 1);
+    let gainL, gainR;
+    // Consider number of channels and pan value's polarity.
+    if (numberOfChannels == 1) {
+      let panRadian = (pan * 0.5 + 0.5) * PI_OVER_TWO;
+      gainL = Math.cos(panRadian);
+      gainR = Math.sin(panRadian);
+    } else {
+      let panRadian = (pan <= 0 ? pan + 1 : pan) * PI_OVER_TWO;
+      if (pan <= 0) {
+        gainL = 1 + Math.cos(panRadian);
+        gainR = Math.sin(panRadian);
+      } else {
+        gainL = Math.cos(panRadian);
+        gainR = 1 + Math.sin(panRadian);
+      }
+    }
+    return {gainL: gainL, gainR: gainR};
+  }
+
+
+  /**
+   * Test implementation class.
+   * @param {Object} options Test options
+   * @param {Object} options.description Test description
+   * @param {Object} options.numberOfInputChannels Number of input channels
+   */
+  function Test(should, options) {
+    // Primary test flag.
+    this.success = true;
+
+    this.should = should;
+    this.context = null;
+    this.prefix = options.prefix;
+    this.numberOfInputChannels = (options.numberOfInputChannels || 1);
+    switch (this.numberOfInputChannels) {
+      case 1:
+        this.description = 'Test for mono input';
+        break;
+      case 2:
+        this.description = 'Test for stereo input';
+        break;
+    }
+
+    // Onset time position of each impulse.
+    this.onsets = [];
+
+    // Pan position value of each impulse.
+    this.panPositions = [];
+
+    // Locations of where the impulses aren't at the expected locations.
+    this.errors = [];
+
+    // The index of the current impulse being verified.
+    this.impulseIndex = 0;
+
+    // The max error we allow between the rendered impulse and the
+    // expected value.  This value is experimentally determined.  Set
+    // to 0 to make the test fail to see what the actual error is.
+    this.maxAllowedError = 1.3e-6;
+
+    // Max (absolute) error and the index of the maxima for the left
+    // and right channels.
+    this.maxErrorL = 0;
+    this.maxErrorR = 0;
+    this.maxErrorIndexL = 0;
+    this.maxErrorIndexR = 0;
+
+    // The maximum value to use for panner pan value. The value will range from
+    // -panLimit to +panLimit.
+    this.panLimit = 1.0625;
+  }
+
+
+  Test.prototype.init = function() {
+    this.context = new OfflineAudioContext(2, gRenderLength, gSampleRate);
+  };
+
+  // Prepare an audio graph for testing. Create multiple impulse generators and
+  // panner nodes, then play them sequentially while varying the pan position.
+  Test.prototype.prepare = function() {
+    let impulse;
+    let impulseLength = Math.round(gTimeStep * gSampleRate);
+    let sources = [];
+    let panners = [];
+
+    // Moves the pan value for each panner by pan step unit from -2 to 2.
+    // This is to check if the internal panning value is clipped properly.
+    let panStep = (2 * this.panLimit) / (gNodesToCreate - 1);
+
+    if (this.numberOfInputChannels === 1) {
+      impulse = createImpulseBuffer(this.context, impulseLength);
+    } else {
+      impulse = createStereoImpulseBuffer(this.context, impulseLength);
+    }
+
+    for (let i = 0; i < gNodesToCreate; i++) {
+      sources[i] = this.context.createBufferSource();
+      panners[i] = this.context.createStereoPanner();
+      sources[i].connect(panners[i]);
+      panners[i].connect(this.context.destination);
+      sources[i].buffer = impulse;
+      panners[i].pan.value = this.panPositions[i] = panStep * i - this.panLimit;
+
+      // Store the onset time position of impulse.
+      this.onsets[i] = gTimeStep * i;
+
+      sources[i].start(this.onsets[i]);
+    }
+  };
+
+
+  Test.prototype.verify = function() {
+    let chanL = this.renderedBufferL;
+    let chanR = this.renderedBufferR;
+    for (let i = 0; i < chanL.length; i++) {
+      // Left and right channels must start at the same instant.
+      if (chanL[i] !== 0 || chanR[i] !== 0) {
+        // Get amount of error between actual and expected gain.
+        let expected = getChannelGain(
+            this.panPositions[this.impulseIndex], this.numberOfInputChannels);
+        let errorL = Math.abs(chanL[i] - expected.gainL);
+        let errorR = Math.abs(chanR[i] - expected.gainR);
+
+        if (errorL > this.maxErrorL) {
+          this.maxErrorL = errorL;
+          this.maxErrorIndexL = this.impulseIndex;
+        }
+        if (errorR > this.maxErrorR) {
+          this.maxErrorR = errorR;
+          this.maxErrorIndexR = this.impulseIndex;
+        }
+
+        // Keep track of the impulses that didn't show up where we expected
+        // them to be.
+        let expectedOffset =
+            timeToSampleFrame(this.onsets[this.impulseIndex], gSampleRate);
+        if (i != expectedOffset) {
+          this.errors.push({actual: i, expected: expectedOffset});
+        }
+
+        this.impulseIndex++;
+      }
+    }
+  };
+
+
+  Test.prototype.showResult = function() {
+    this.should(this.impulseIndex, this.prefix + 'Number of impulses found')
+        .beEqualTo(gNodesToCreate);
+
+    this.should(
+            this.errors.length,
+            this.prefix + 'Number of impulse at the wrong offset')
+        .beEqualTo(0);
+
+    this.should(this.maxErrorL, this.prefix + 'Left channel error magnitude')
+        .beLessThanOrEqualTo(this.maxAllowedError);
+
+    this.should(this.maxErrorR, this.prefix + 'Right channel error magnitude')
+        .beLessThanOrEqualTo(this.maxAllowedError);
+  };
+
+  Test.prototype.run = function() {
+
+    this.init();
+    this.prepare();
+
+    return this.context.startRendering().then(renderedBuffer => {
+      this.renderedBufferL = renderedBuffer.getChannelData(0);
+      this.renderedBufferR = renderedBuffer.getChannelData(1);
+      this.verify();
+      this.showResult();
+    });
+  };
+
+  return {
+    create: function(should, options) {
+      return new Test(should, options);
+    }
+  };
+
+})();
diff --git a/tests/wpt/web-platform-tests/webaudio/the-audio-api/the-stereopanner-interface/no-dezippering.html b/tests/wpt/web-platform-tests/webaudio/the-audio-api/the-stereopanner-interface/no-dezippering.html
new file mode 100644
index 00000000000..a61f3983049
--- /dev/null
+++ b/tests/wpt/web-platform-tests/webaudio/the-audio-api/the-stereopanner-interface/no-dezippering.html
@@ -0,0 +1,261 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <title>
+      Test StereoPannerNode Has No Dezippering
+    </title>
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+    <script src="../../resources/audit-util.js"></script>
+    <script src="../../resources/audit.js"></script>
+  </head>
+  <body>
+    <script id="layout-test-code">
+      // Arbitrary sample rate except that it should be a power of two to
+      // eliminate any round-off in computing frame boundaries.
+      let sampleRate = 16384;
+
+      let audit = Audit.createTaskRunner();
+
+      audit.define(
+          {
+            label: 'test mono input',
+            description: 'Test StereoPanner with mono input has no dezippering'
+          },
+          (task, should) => {
+            let context = new OfflineAudioContext(2, sampleRate, sampleRate);
+            let src = new ConstantSourceNode(context, {offset: 1});
+            let p = new StereoPannerNode(context, {pan: -1});
+
+            src.connect(p).connect(context.destination);
+            src.start();
+
+            // Frame at which to change pan value.
+            let panFrame = 256;
+            context.suspend(panFrame / context.sampleRate)
+                .then(() => p.pan.value = 1)
+                .then(() => context.resume());
+
+            context.startRendering()
+                .then(renderedBuffer => {
+                  let c0 = renderedBuffer.getChannelData(0);
+                  let c1 = renderedBuffer.getChannelData(1);
+
+                  // The first part should be full left.
+                  should(
+                      c0.slice(0, panFrame), 'Mono: Left channel, pan = -1: ')
+                      .beConstantValueOf(1);
+                  should(
+                      c1.slice(0, panFrame), 'Mono: Right channel, pan = -1:')
+                      .beConstantValueOf(0);
+
+                  // The second part should be full right, but due to roundoff,
+                  // the left channel won't be exactly zero.  Compare the left
+                  // channel against zero with a threshold instead.
+                  let tail = c0.slice(panFrame);
+                  let zero = new Float32Array(tail.length);
+
+                  should(c0.slice(panFrame), 'Mono: Left channel, pan = 1: ')
+                      .beCloseToArray(zero, {absoluteThreshold: 6.1233e-17});
+                  should(c1.slice(panFrame), 'Mono: Right channel, pan = 1:')
+                      .beConstantValueOf(1);
+                })
+                .then(() => task.done());
+          });
+
+      audit.define(
+          {
+            label: 'test stereo input',
+            description:
+                'Test StereoPanner with stereo input has no dezippering'
+          },
+          (task, should) => {
+            let context = new OfflineAudioContext(2, sampleRate, sampleRate);
+
+            // Create stereo source from two constant source nodes.
+            let s0 = new ConstantSourceNode(context, {offset: 1});
+            let s1 = new ConstantSourceNode(context, {offset: 2});
+            let merger = new ChannelMergerNode(context, {numberOfInputs: 2});
+
+            s0.connect(merger, 0, 0);
+            s1.connect(merger, 0, 1);
+
+            let p = new StereoPannerNode(context, {pan: -1});
+
+            merger.connect(p).connect(context.destination);
+            s0.start();
+            s1.start();
+
+            // Frame at which to change pan value.
+            let panFrame = 256;
+            context.suspend(panFrame / context.sampleRate)
+                .then(() => p.pan.value = 1)
+                .then(() => context.resume());
+
+            context.startRendering()
+                .then(renderedBuffer => {
+                  let c0 = renderedBuffer.getChannelData(0);
+                  let c1 = renderedBuffer.getChannelData(1);
+
+                  // The first part should be full left.
+                  should(
+                      c0.slice(0, panFrame), 'Stereo: Left channel, pan = -1: ')
+                      .beConstantValueOf(3);
+                  should(
+                      c1.slice(0, panFrame), 'Stereo: Right channel, pan = -1:')
+                      .beConstantValueOf(0);
+
+                  // The second part should be full right, but due to roundoff,
+                  // the left channel won't be exactly zero.  Compare the left
+                  // channel against zero with a threshold instead.
+                  let tail = c0.slice(panFrame);
+                  let zero = new Float32Array(tail.length);
+
+                  should(c0.slice(panFrame), 'Stereo: Left channel, pan = 1: ')
+                      .beCloseToArray(zero, {absoluteThreshold: 6.1233e-17});
+                  should(c1.slice(panFrame), 'Stereo: Right channel, pan = 1:')
+                      .beConstantValueOf(3);
+                })
+                .then(() => task.done());
+          });
+
+      audit.define(
+          {
+            label: 'test mono input setValue',
+            description: 'Test StereoPanner with mono input value setter ' +
+                'vs setValueAtTime'
+          },
+          (task, should) => {
+            let context = new OfflineAudioContext(4, sampleRate, sampleRate);
+
+            let src = new OscillatorNode(context);
+
+            src.start();
+            testWithSetValue(context, src, should, {
+              prefix: 'Mono'
+            }).then(() => task.done());
+          });
+
+      audit.define(
+          {
+            label: 'test stereo input setValue',
+            description: 'Test StereoPanner with mono input value setter ' +
+                ' vs setValueAtTime'
+          },
+          (task, should) => {
+            let context = new OfflineAudioContext(4, sampleRate, sampleRate);
+
+            let src0 = new OscillatorNode(context, {frequency: 800});
+            let src1 = new OscillatorNode(context, {frequency: 250});
+            let merger = new ChannelMergerNode(context, {numberOfChannels: 2});
+
+            src0.connect(merger, 0, 0);
+            src1.connect(merger, 0, 1);
+
+            src0.start();
+            src1.start();
+
+            testWithSetValue(context, merger, should, {
+              prefix: 'Stereo'
+            }).then(() => task.done());
+          });
+
+      audit.define(
+          {
+            label: 'test mono input automation',
+            description: 'Test StereoPanner with mono input and automation'
+          },
+          (task, should) => {
+            let context = new OfflineAudioContext(4, sampleRate, sampleRate);
+
+            let src0 = new OscillatorNode(context, {frequency: 800});
+            let src1 = new OscillatorNode(context, {frequency: 250});
+            let merger = new ChannelMergerNode(context, {numberOfChannels: 2});
+
+            src0.connect(merger, 0, 0);
+            src1.connect(merger, 0, 1);
+
+            src0.start();
+            src1.start();
+
+            let mod = new OscillatorNode(context, {frequency: 100});
+            mod.start();
+
+            testWithSetValue(context, merger, should, {
+              prefix: 'Modulated Stereo',
+              modulator: (testNode, refNode) => {
+                mod.connect(testNode.pan);
+                mod.connect(refNode.pan);
+              }
+            }).then(() => task.done());
+          });
+
+
+      function testWithSetValue(context, src, should, options) {
+        let merger = new ChannelMergerNode(
+            context, {numberOfInputs: context.destination.channelCount});
+        merger.connect(context.destination);
+
+        let pannerRef = new StereoPannerNode(context, {pan: -0.3});
+        let pannerTest =
+            new StereoPannerNode(context, {pan: pannerRef.pan.value});
+
+        let refSplitter =
+            new ChannelSplitterNode(context, {numberOfOutputs: 2});
+        let testSplitter =
+            new ChannelSplitterNode(context, {numberOfOutputs: 2});
+
+        pannerRef.connect(refSplitter);
+        pannerTest.connect(testSplitter);
+
+        testSplitter.connect(merger, 0, 0);
+        testSplitter.connect(merger, 1, 1);
+        refSplitter.connect(merger, 0, 2);
+        refSplitter.connect(merger, 1, 3);
+
+        src.connect(pannerRef);
+        src.connect(pannerTest);
+
+        let changeTime = 3 * RENDER_QUANTUM_FRAMES / context.sampleRate;
+        // An arbitrary position, different from the default pan value.
+        let newPanPosition = .71;
+
+        pannerRef.pan.setValueAtTime(newPanPosition, changeTime);
+        context.suspend(changeTime)
+            .then(() => pannerTest.pan.value = newPanPosition)
+            .then(() => context.resume());
+
+        if (options.modulator) {
+          options.modulator(pannerTest, pannerRef);
+        }
+        return context.startRendering().then(renderedBuffer => {
+          let actual = new Array(2);
+          let expected = new Array(2);
+
+          actual[0] = renderedBuffer.getChannelData(0);
+          actual[1] = renderedBuffer.getChannelData(1);
+          expected[0] = renderedBuffer.getChannelData(2);
+          expected[1] = renderedBuffer.getChannelData(3);
+
+          let label = ['Left', 'Right'];
+
+          for (let k = 0; k < 2; ++k) {
+            let match =
+                should(
+                    actual[k],
+                    options.prefix + ' ' + label[k] + ' .value setter output')
+                    .beEqualToArray(expected[k]);
+            should(
+                match,
+                options.prefix + ' ' + label[k] +
+                    ' .value setter output matches setValueAtTime output')
+                .beTrue();
+          }
+
+        });
+      }
+
+      audit.run();
+    </script>
+  </body>
+</html>
diff --git a/tests/wpt/web-platform-tests/webaudio/the-audio-api/the-stereopanner-interface/stereopannernode-basic.html b/tests/wpt/web-platform-tests/webaudio/the-audio-api/the-stereopanner-interface/stereopannernode-basic.html
new file mode 100644
index 00000000000..48bacb08c6d
--- /dev/null
+++ b/tests/wpt/web-platform-tests/webaudio/the-audio-api/the-stereopanner-interface/stereopannernode-basic.html
@@ -0,0 +1,54 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <title>
+      stereopannernode-basic.html
+    </title>
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+    <script src="../../resources/audit-util.js"></script>
+    <script src="../../resources/audit.js"></script>
+  </head>
+  <body>
+    <script id="layout-test-code">
+      let audit = Audit.createTaskRunner();
+
+      audit.define(
+          {
+            label: 'test',
+            description:
+                'Attributes and basic functionality of StereoPannerNode'
+          },
+          (task, should) => {
+
+            let context = new AudioContext();
+            let panner = context.createStereoPanner();
+
+            should(panner.numberOfInputs, 'panner.numberOfInputs').beEqualTo(1);
+            should(panner.numberOfOutputs, 'panner.numberOfOutputs')
+                .beEqualTo(1);
+            should(panner.pan.defaultValue, 'panner.pan.defaultValue')
+                .beEqualTo(0.0);
+            should(() => panner.pan.value = 1.0, 'panner.pan.value = 1.0')
+                .notThrow();
+            should(panner.pan.value, 'panner.pan.value').beEqualTo(1.0);
+
+            should(() => panner.channelCount = 1, 'panner.channelCount = 1')
+                .notThrow();
+            should(() => panner.channelCount = 3, 'panner.channelCount = 3')
+                .throw();
+            should(
+                () => panner.channelCountMode = 'explicit',
+                'panner.channelCountMode = "explicit"')
+                .notThrow();
+            should(
+                () => panner.channelCountMode = 'max',
+                'panner.channelCountMode = "max"')
+                .throw();
+
+            task.done();
+          });
+      audit.run();
+    </script>
+  </body>
+</html>
diff --git a/tests/wpt/web-platform-tests/webaudio/the-audio-api/the-stereopanner-interface/stereopannernode-panning.html b/tests/wpt/web-platform-tests/webaudio/the-audio-api/the-stereopanner-interface/stereopannernode-panning.html
new file mode 100644
index 00000000000..f683fd78bf9
--- /dev/null
+++ b/tests/wpt/web-platform-tests/webaudio/the-audio-api/the-stereopanner-interface/stereopannernode-panning.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <title>
+      stereopannernode-panning.html
+    </title>
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+    <script src="../../resources/audit-util.js"></script>
+    <script src="../../resources/audit.js"></script>
+    <script src="../../resources/stereopanner-testing.js"></script>
+  </head>
+  <body>
+    <script id="layout-test-code">
+      let audit = Audit.createTaskRunner();
+
+      audit.define('mono-test', (task, should) => {
+        StereoPannerTest
+            .create(should, {numberOfInputChannels: 1, prefix: 'Mono: '})
+            .run()
+            .then(() => task.done());
+      });
+
+      audit.define('stereo-test', (task, should) => {
+        StereoPannerTest
+            .create(should, {numberOfInputChannels: 2, prefix: 'Stereo: '})
+            .run()
+            .then(() => task.done());
+      });
+
+      audit.run();
+    </script>
+  </body>
+</html>
diff --git a/tests/wpt/web-platform-tests/webaudio/the-audio-api/the-waveshapernode-interface/waveshaper-copy-curve.html b/tests/wpt/web-platform-tests/webaudio/the-audio-api/the-waveshapernode-interface/waveshaper-copy-curve.html
new file mode 100644
index 00000000000..e897ac08a10
--- /dev/null
+++ b/tests/wpt/web-platform-tests/webaudio/the-audio-api/the-waveshapernode-interface/waveshaper-copy-curve.html
@@ -0,0 +1,100 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <title>
+      Test WaveShaper Copies Curve Data
+    </title>
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+    <script src="../../resources/audit-util.js"></script>
+    <script src="../../resources/audit.js"></script>
+  </head>
+  <body>
+    <script id="layout-test-code">
+      // Sample rate and number of frames are fairly arbitrary.  We need to
+      // render, however, at least 384 frames.  1024 is a nice small value.
+      let sampleRate = 16000;
+      let renderFrames = 1024;
+
+      let audit = Audit.createTaskRunner();
+
+      audit.define(
+          {
+            label: 'test copying',
+            description: 'Modifying curve should not modify WaveShaper'
+          },
+          (task, should) => {
+            // Two-channel context; channel 0 contains the test data and channel
+            // 1 contains the expected result.  Channel 1 has the normal
+            // WaveShaper output and channel 0 has the WaveShaper output with a
+            // modified curve.
+            let context = new OfflineAudioContext(2, renderFrames, sampleRate);
+
+            // Just use a default oscillator as the source.  Doesn't really
+            // matter what we use.
+            let src = context.createOscillator();
+            src.type = 'sawtooth';
+
+            // Create the wave shapers: ws0 is the test shaper, and ws1 is the
+            // reference wave shaper.
+            let ws0 = context.createWaveShaper();
+            let ws1 = context.createWaveShaper();
+
+            // Wave shaper curves.  Doesn't really matter what we use as long as
+            // it modifies the input in some way.  Thus, keep it simple and just
+            // invert the input.
+            let desiredCurve = [1, 0, -1];
+            let curve0 = Float32Array.from(desiredCurve);
+            let curve1 = Float32Array.from(desiredCurve);
+
+            ws0.curve = curve0;
+            ws1.curve = curve1;
+
+            let merger = context.createChannelMerger(2);
+
+            // Connect the graph
+            src.connect(ws0);
+            src.connect(ws1);
+
+            ws0.connect(merger, 0, 0);
+            ws1.connect(merger, 0, 1);
+
+            merger.connect(context.destination);
+
+            // Let the context run for a bit and then modify the curve for ws0.
+            // Doesn't really matter what we modify the curve to as long as it's
+            // different.
+            context.suspend(256 / context.sampleRate)
+                .then(() => {
+                  should(
+                      () => {
+                        curve0[0] = -0.5;
+                        curve0[1] = 0.125;
+                        curve0[2] = 0.75;
+                      },
+                      `Modifying curve array at time ${context.currentTime}`)
+                      .notThrow();
+                })
+                .then(context.resume.bind(context));
+
+            src.start();
+
+            context.startRendering()
+                .then(function(renderedBuffer) {
+                  let actual = renderedBuffer.getChannelData(0);
+                  let expected = renderedBuffer.getChannelData(1);
+
+                  // Modifying the wave shaper curve should not modify the
+                  // output so the outputs from the two wave shaper nodes should
+                  // be exactly identical.
+                  should(actual, 'Output of WaveShaper with modified curve')
+                      .beEqualToArray(expected);
+
+                })
+                .then(() => task.done());
+          });
+
+      audit.run();
+    </script>
+  </body>
+</html>
diff --git a/tests/wpt/web-platform-tests/webaudio/the-audio-api/the-waveshapernode-interface/waveshaper-limits.html b/tests/wpt/web-platform-tests/webaudio/the-audio-api/the-waveshapernode-interface/waveshaper-limits.html
new file mode 100644
index 00000000000..13e88be567b
--- /dev/null
+++ b/tests/wpt/web-platform-tests/webaudio/the-audio-api/the-waveshapernode-interface/waveshaper-limits.html
@@ -0,0 +1,110 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <title>
+      waveshaper-limits.html
+    </title>
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+    <script src="../../resources/audit-util.js"></script>
+    <script src="../../resources/audit.js"></script>
+  </head>
+  <body>
+    <script id="layout-test-code">
+      let audit = Audit.createTaskRunner();
+
+      let context;
+      let bufferData;
+      let outputData;
+      let reference;
+
+      let sampleRate = 48000;
+      // Must be odd so we have an exact middle point.
+      let testFrames = 23;
+      let scale = 1 / ((testFrames - 1) / 2 - 1);
+      // Number of decimal digits to print
+      let decimals = 6;
+      // Required accuracy
+      let diffThreshold = Math.pow(10, -decimals);
+
+      // Generate reference data
+      function generateReference() {
+        // The curve data is 0, 1, 0, and the input data is a ramp from -1+eps
+        // to 1+eps.  Then the output is a ramp from 0 to 1 back to 0.
+        let ref = new Float32Array(testFrames);
+        let midPoint = (testFrames - 1) / 2;
+        // First sample is below -1 at -1-scale.
+        ref[0] = 0;
+        // Generate ramp up to the mid-point
+        for (let k = 0; k < midPoint; ++k) {
+          ref[k + 1] = k * scale;
+        }
+        // The value at the mid-point must be 1, from the curve
+        ref[midPoint] = 1;
+        // Generate a ramp from 1 down to 0
+        for (let k = midPoint; k < testFrames - 1; ++k) {
+          ref[k + 1] = 2 - k * scale;
+        }
+        // The last sample is out of range at 1+scale
+        ref[testFrames - 1] = 0;
+        return ref;
+      }
+
+      function checkResult(renderedBuffer, should) {
+        outputData = renderedBuffer.getChannelData(0);
+        reference = generateReference();
+        let success = true;
+        // Verify that every output value matches our expected reference value.
+        for (let k = 0; k < outputData.length; ++k) {
+          let diff = outputData[k] - reference[k];
+          should(
+              Math.abs(diff),
+              'Max error mapping ' + bufferData[k].toFixed(decimals) + ' to ' +
+                  outputData[k].toFixed(decimals))
+              .beLessThanOrEqualTo(diffThreshold);
+        }
+      }
+
+      audit.define(
+          {
+            label: 'test',
+            description:
+                'WaveShaperNode including values outside the range of [-1,1]'
+          },
+          function(task, should) {
+            context = new OfflineAudioContext(1, testFrames, sampleRate);
+            // Create input values between -1.1 and 1.1
+            let buffer =
+                context.createBuffer(1, testFrames, context.sampleRate);
+            bufferData = new Float32Array(testFrames);
+            let start = -1 - scale;
+            for (let k = 0; k < testFrames; ++k) {
+              bufferData[k] = k * scale + start;
+            }
+            buffer.copyToChannel(bufferData, 0);
+
+            let source = context.createBufferSource();
+            source.buffer = buffer;
+
+            // Create simple waveshaper. It should map -1 to 0, 0 to 1, and +1
+            // to 0 and interpolate all points in between using a simple linear
+            // interpolator.
+            let shaper = context.createWaveShaper();
+            let curve = new Float32Array(3);
+            curve[0] = 0;
+            curve[1] = 1;
+            curve[2] = 0;
+            shaper.curve = curve;
+            source.connect(shaper);
+            shaper.connect(context.destination);
+
+            source.start();
+            context.startRendering()
+                .then(buffer => checkResult(buffer, should))
+                .then(() => task.done());
+          });
+
+      audit.run();
+    </script>
+  </body>
+</html>
diff --git a/tests/wpt/web-platform-tests/webaudio/the-audio-api/the-waveshapernode-interface/waveshaper-simple.html b/tests/wpt/web-platform-tests/webaudio/the-audio-api/the-waveshapernode-interface/waveshaper-simple.html
new file mode 100644
index 00000000000..affd0c58afa
--- /dev/null
+++ b/tests/wpt/web-platform-tests/webaudio/the-audio-api/the-waveshapernode-interface/waveshaper-simple.html
@@ -0,0 +1,61 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <title>
+      Simple Tests of WaveShaperNode
+    </title>
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+    <script src="../../resources/audit-util.js"></script>
+    <script src="../../resources/audit.js"></script>
+  </head>
+  <body>
+    <script id="layout-test-code">
+      let audit = Audit.createTaskRunner();
+
+      audit.define('simple', (task, should) => {
+        let context = new OfflineAudioContext(1, 1, 48000);
+        let shaper = context.createWaveShaper();
+
+        // Verify default values are correct.
+        should(shaper.curve, 'Initial WaveShaper.curve').beEqualTo(null);
+        should(shaper.oversample, 'Initial WaveShaper.oversample')
+            .beEqualTo('none');
+
+        // Set oversample and verify that it is set correctly.
+        should(() => shaper.oversample = '2x', 'Setting oversample to "2x"')
+            .notThrow();
+        should(shaper.oversample, 'Waveshaper.oversample = "2x"')
+            .beEqualTo('2x');
+
+        should(() => shaper.oversample = '4x', 'Setting oversample to "4x"')
+            .notThrow();
+        should(shaper.oversample, 'Waveshaper.oversample = "4x"')
+            .beEqualTo('4x');
+
+        should(
+            () => shaper.oversample = 'invalid',
+            'Setting oversample to "invalid"')
+            .notThrow();
+        should(shaper.oversample, 'Waveshaper.oversample = "invalid"')
+            .beEqualTo('4x');
+
+        // Set the curve and verify that the returned curve is the same as what
+        // it was set to.
+        let curve = Float32Array.from([-1, 0.25, .75]);
+        should(() => shaper.curve = curve, 'Setting curve to [' + curve + ']')
+            .notThrow();
+        should(shaper.curve, 'WaveShaper.curve').beEqualToArray(curve);
+
+        // Verify setting the curve to null works.
+        should(() => shaper.curve = null, 'Setting curve back to null')
+            .notThrow();
+        should(shaper.curve, 'Waveshaper.curve = null').beEqualTo(null);
+
+        task.done();
+      });
+
+      audit.run();
+    </script>
+  </body>
+</html>
diff --git a/tests/wpt/web-platform-tests/webaudio/the-audio-api/the-waveshapernode-interface/waveshaper.html b/tests/wpt/web-platform-tests/webaudio/the-audio-api/the-waveshapernode-interface/waveshaper.html
new file mode 100644
index 00000000000..8bfa009b181
--- /dev/null
+++ b/tests/wpt/web-platform-tests/webaudio/the-audio-api/the-waveshapernode-interface/waveshaper.html
@@ -0,0 +1,127 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <title>
+      waveshaper.html
+    </title>
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+    <script src="../../resources/audit-util.js"></script>
+    <script src="../../resources/audit.js"></script>
+    <script src="../../resources/buffer-loader.js"></script>
+  </head>
+  <body>
+    <script id="layout-test-code">
+      let audit = Audit.createTaskRunner();
+
+      let sampleRate = 44100;
+      let lengthInSeconds = 4;
+      let numberOfRenderFrames = sampleRate * lengthInSeconds;
+      let numberOfCurveFrames = 65536;
+      let inputBuffer;
+      let waveShapingCurve;
+
+      let context;
+
+      function generateInputBuffer() {
+        // Create mono input buffer.
+        let buffer =
+            context.createBuffer(1, numberOfRenderFrames, context.sampleRate);
+        let data = buffer.getChannelData(0);
+
+        // Generate an input vector with values from -1 -> +1 over a duration of
+        // lengthInSeconds. This exercises the full nominal input range and will
+        // touch every point of the shaping curve.
+        for (let i = 0; i < numberOfRenderFrames; ++i) {
+          let x = i / numberOfRenderFrames;  // 0 -> 1
+          x = 2 * x - 1;                     // -1 -> +1
+          data[i] = x;
+        }
+
+        return buffer;
+      }
+
+      // Generates a symmetric curve: Math.atan(5 * x) / (0.5 * Math.PI)
+      // (with x == 0 corresponding to the center of the array)
+      // This curve is arbitrary, but would be useful in the real-world.
+      // To some extent, the actual curve we choose is not important in this
+      // test, since the input vector walks through all possible curve values.
+      function generateWaveShapingCurve() {
+        let curve = new Float32Array(numberOfCurveFrames);
+
+        let n = numberOfCurveFrames;
+        let n2 = n / 2;
+
+        for (let i = 0; i < n; ++i) {
+          let x = (i - n2) / n2;
+          let y = Math.atan(5 * x) / (0.5 * Math.PI);
+        }
+
+        return curve;
+      }
+
+      function checkShapedCurve(buffer, should) {
+        let inputData = inputBuffer.getChannelData(0);
+        let outputData = buffer.getChannelData(0);
+
+        let success = true;
+
+        // Go through every sample and make sure it has been shaped exactly
+        // according to the shaping curve we gave it.
+        for (let i = 0; i < buffer.length; ++i) {
+          let input = inputData[i];
+
+          // Calculate an index based on input -1 -> +1 with 0 being at the
+          // center of the curve data.
+          let index = Math.floor(numberOfCurveFrames * 0.5 * (input + 1));
+
+          // Clip index to the input range of the curve.
+          // This takes care of input outside of nominal range -1 -> +1
+          index = index < 0 ? 0 : index;
+          index =
+              index > numberOfCurveFrames - 1 ? numberOfCurveFrames - 1 : index;
+
+          let expectedOutput = waveShapingCurve[index];
+
+          let output = outputData[i];
+
+          if (output != expectedOutput) {
+            success = false;
+            break;
+          }
+        }
+
+        should(
+            success, 'WaveShaperNode applied non-linear distortion correctly')
+            .beTrue();
+      }
+
+      audit.define('test', function(task, should) {
+        // Create offline audio context.
+        context = new OfflineAudioContext(1, numberOfRenderFrames, sampleRate);
+
+        // source -> waveshaper -> destination
+        let source = context.createBufferSource();
+        let waveshaper = context.createWaveShaper();
+        source.connect(waveshaper);
+        waveshaper.connect(context.destination);
+
+        // Create an input test vector.
+        inputBuffer = generateInputBuffer();
+        source.buffer = inputBuffer;
+
+        // We'll apply non-linear distortion according to this shaping curve.
+        waveShapingCurve = generateWaveShapingCurve();
+        waveshaper.curve = waveShapingCurve;
+
+        source.start(0);
+
+        context.startRendering()
+            .then(buffer => checkShapedCurve(buffer, should))
+            .then(task.done.bind(task));
+      });
+
+      audit.run();
+    </script>
+  </body>
+</html>
diff --git a/tests/wpt/web-platform-tests/webrtc/historical.html b/tests/wpt/web-platform-tests/webrtc/historical.html
index c57a1ca362e..d49503e16d6 100644
--- a/tests/wpt/web-platform-tests/webrtc/historical.html
+++ b/tests/wpt/web-platform-tests/webrtc/historical.html
@@ -25,6 +25,7 @@ test(function() {
 });
 
 [
+  "DataChannel",
   "mozRTCIceCandidate",
   "mozRTCPeerConnection",
   "mozRTCSessionDescription",
diff --git a/tests/wpt/web-platform-tests/webvtt/api/VTTRegion/constructor.html b/tests/wpt/web-platform-tests/webvtt/api/VTTRegion/constructor.html
index 59eeaf8a108..cddde0a0717 100644
--- a/tests/wpt/web-platform-tests/webvtt/api/VTTRegion/constructor.html
+++ b/tests/wpt/web-platform-tests/webvtt/api/VTTRegion/constructor.html
@@ -40,7 +40,6 @@ test(function() {
         }
     }
 
-    assert_throws("IndexSizeError", function() { region.lines = -1; });
     assert_equals(region.lines, 3);
 
     region.lines = 130;
diff --git a/tests/wpt/web-platform-tests/webvtt/api/VTTRegion/lines.html b/tests/wpt/web-platform-tests/webvtt/api/VTTRegion/lines.html
index a9be6106754..90e08b48930 100644
--- a/tests/wpt/web-platform-tests/webvtt/api/VTTRegion/lines.html
+++ b/tests/wpt/web-platform-tests/webvtt/api/VTTRegion/lines.html
@@ -17,8 +17,12 @@ test(function() {
     // https://heycam.github.io/webidl/#abstract-opdef-converttoint
     [[0, 0],
      [-0, 0],
+     [-1, 4294967295],
+     [-100, 4294967196],
      [101, 101],
+     [-2147483648, 2147483648],
      [2147483647, 2147483647],
+     [2147483648, 2147483648],
      [NaN, 0],
      [Infinity, 0],
      [-Infinity, 0]].forEach(function (pair) {
@@ -28,10 +32,5 @@ test(function() {
         assert_equals(region.lines, expected);
     });
 
-    [-1, -100, -2147483648, 2147483648 /* wraps to -2147483648 */].forEach(function (invalid) {
-        assert_throws('IndexSizeError', function() {
-          region.lines = invalid;
-        }, invalid);
-    });
 }, document.title + ' script-created region');
 </script>