Auto merge of #5905 - Ms2ger:css, r=jdm

<!-- Reviewable:start -->
[<img src="https://reviewable.io/review_button.png" height=40 alt="Review on Reviewable"/>](https://reviewable.io/reviews/servo/servo/5905)
<!-- Reviewable:end -->

8 files changed, 84 insertions, 12 deletions

diff --git a/tests/ref/basic.list b/tests/ref/basic.list
index 7c343382004..2c012b8e3f0 100644
--- a/tests/ref/basic.list
+++ b/tests/ref/basic.list
@@ -38,9 +38,6 @@ fragment=top != ../html/acid2.html acid2_ref.html
 == 2dcontext/lineto_a.html 2dcontext/lineto_ref.html
 == 2dcontext/transform_a.html 2dcontext/transform_ref.html
 
-== absolute_clipping_of_own_contents_a.html absolute_clipping_of_own_contents_ref.html
-== absolute_content_height_a.html absolute_content_height_ref.html
-== absolute_hypothetical_float_a.html absolute_hypothetical_float_ref.html
 == acid1_a.html acid1_b.html
 == acid2_noscroll.html acid2_ref_broken.html
 == after_block_iteration.html after_block_iteration_ref.html
diff --git a/tests/wpt/mozilla/meta/MANIFEST.json b/tests/wpt/mozilla/meta/MANIFEST.json
index 1386dc24326..841aa8f1c5b 100644
--- a/tests/wpt/mozilla/meta/MANIFEST.json
+++ b/tests/wpt/mozilla/meta/MANIFEST.json
@@ -27,6 +27,42 @@
             "url": "/_mozilla/css/abs_float_pref_width.html"
           }
         ],
+        "css/absolute_clipping_of_own_contents.html": [
+          {
+            "path": "css/absolute_clipping_of_own_contents.html",
+            "references": [
+              [
+                "/_mozilla/css/absolute_clipping_of_own_contents_ref.html",
+                "=="
+              ]
+            ],
+            "url": "/_mozilla/css/absolute_clipping_of_own_contents.html"
+          }
+        ],
+        "css/absolute_content_height.html": [
+          {
+            "path": "css/absolute_content_height.html",
+            "references": [
+              [
+                "/_mozilla/css/absolute_content_height_ref.html",
+                "=="
+              ]
+            ],
+            "url": "/_mozilla/css/absolute_content_height.html"
+          }
+        ],
+        "css/absolute_hypothetical_float.html": [
+          {
+            "path": "css/absolute_hypothetical_float.html",
+            "references": [
+              [
+                "/_mozilla/css/absolute_hypothetical_float_ref.html",
+                "=="
+              ]
+            ],
+            "url": "/_mozilla/css/absolute_hypothetical_float.html"
+          }
+        ],
         "css/class-namespaces.html": [
           {
             "path": "css/class-namespaces.html",
@@ -536,28 +572,64 @@
       }
     },
     "reftest_nodes": {
-      "css/class-namespaces.html": [
+      "css/abs_float_pref_width.html": [
         {
-          "path": "css/class-namespaces.html",
+          "path": "css/abs_float_pref_width.html",
           "references": [
             [
-              "/_mozilla/css/class-namespaces-ref.html",
+              "/_mozilla/css/abs_float_pref_width-ref.html",
               "=="
             ]
           ],
-          "url": "/_mozilla/css/class-namespaces.html"
+          "url": "/_mozilla/css/abs_float_pref_width.html"
         }
       ],
-      "css/abs_float_pref_width.html": [
+      "css/absolute_clipping_of_own_contents.html": [
         {
-          "path": "css/abs_float_pref_width.html",
+          "path": "css/absolute_clipping_of_own_contents.html",
           "references": [
             [
-              "/_mozilla/css/abs_float_pref_width-ref.html",
+              "/_mozilla/css/absolute_clipping_of_own_contents_ref.html",
               "=="
             ]
           ],
-          "url": "/_mozilla/css/abs_float_pref_width.html"
+          "url": "/_mozilla/css/absolute_clipping_of_own_contents.html"
+        }
+      ],
+      "css/absolute_content_height.html": [
+        {
+          "path": "css/absolute_content_height.html",
+          "references": [
+            [
+              "/_mozilla/css/absolute_content_height_ref.html",
+              "=="
+            ]
+          ],
+          "url": "/_mozilla/css/absolute_content_height.html"
+        }
+      ],
+      "css/absolute_hypothetical_float.html": [
+        {
+          "path": "css/absolute_hypothetical_float.html",
+          "references": [
+            [
+              "/_mozilla/css/absolute_hypothetical_float_ref.html",
+              "=="
+            ]
+          ],
+          "url": "/_mozilla/css/absolute_hypothetical_float.html"
+        }
+      ],
+      "css/class-namespaces.html": [
+        {
+          "path": "css/class-namespaces.html",
+          "references": [
+            [
+              "/_mozilla/css/class-namespaces-ref.html",
+              "=="
+            ]
+          ],
+          "url": "/_mozilla/css/class-namespaces.html"
         }
       ]
     }
@@ -566,4 +638,4 @@
   "rev": null,
   "url_base": "/_mozilla/",
   "version": 2
-}
+}
\ No newline at end of file
diff --git a/tests/ref/absolute_clipping_of_own_contents_a.html b/tests/wpt/mozilla/tests/css/absolute_clipping_of_own_contents.html
index b018d799a86..19919ff89c7 100644
--- a/tests/ref/absolute_clipping_of_own_contents_a.html
+++ b/tests/wpt/mozilla/tests/css/absolute_clipping_of_own_contents.html
@@ -2,6 +2,7 @@
 <html>
 <head>
 <!-- Tests that clipping is preserved properly for nested `position: absolute` elements. -->
+<link rel=match href=absolute_clipping_of_own_contents_ref.html>
 <style>
 body, html {
     margin: 0;
diff --git a/tests/ref/absolute_clipping_of_own_contents_ref.html b/tests/wpt/mozilla/tests/css/absolute_clipping_of_own_contents_ref.html
index 96608da13c9..96608da13c9 100644
--- a/tests/ref/absolute_clipping_of_own_contents_ref.html
+++ b/tests/wpt/mozilla/tests/css/absolute_clipping_of_own_contents_ref.html
diff --git a/tests/ref/absolute_content_height_a.html b/tests/wpt/mozilla/tests/css/absolute_content_height.html
index 8f12b89aef8..80ac5b8daae 100644
--- a/tests/ref/absolute_content_height_a.html
+++ b/tests/wpt/mozilla/tests/css/absolute_content_height.html
@@ -1,6 +1,7 @@
 <!DOCTYPE html>
 <html>
 <head>
+<link rel=match href=absolute_content_height_ref.html>
 <style>
 section {
     position: absolute;
diff --git a/tests/ref/absolute_content_height_ref.html b/tests/wpt/mozilla/tests/css/absolute_content_height_ref.html
index bb239ed179f..bb239ed179f 100644
--- a/tests/ref/absolute_content_height_ref.html
+++ b/tests/wpt/mozilla/tests/css/absolute_content_height_ref.html
diff --git a/tests/ref/absolute_hypothetical_float_a.html b/tests/wpt/mozilla/tests/css/absolute_hypothetical_float.html
index 78f1c70e04d..33506180d15 100644
--- a/tests/ref/absolute_hypothetical_float_a.html
+++ b/tests/wpt/mozilla/tests/css/absolute_hypothetical_float.html
@@ -1,6 +1,7 @@
 <!DOCTYPE html>
 <html>
 <head>
+<link rel=match href=absolute_hypothetical_float_ref.html>
 <style>
 #a {
     float: right;
diff --git a/tests/ref/absolute_hypothetical_float_ref.html b/tests/wpt/mozilla/tests/css/absolute_hypothetical_float_ref.html
index 008b2a65d29..008b2a65d29 100644
--- a/tests/ref/absolute_hypothetical_float_ref.html
+++ b/tests/wpt/mozilla/tests/css/absolute_hypothetical_float_ref.html