Auto merge of #12383 - zeusintuivo:feature/11611, r=nox

Rename SharedKeyboardAndMouseEventInit to EventModifierInit

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- [X] renamed file SharedMouseAndKeyboardEventInit,
- [X] changed SharedKeyboardAndMouseEventInit to EventModifierInit.
- [X] Rebased mozilla/master into it.
- [x] Ran build and tidy test without errors

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- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [X] These changes fix #11611 (github issue number if applicable).

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1 files changed, 22 insertions, 0 deletions

diff --git a/components/script/dom/webidls/EventModifierInit.webidl b/components/script/dom/webidls/EventModifierInit.webidl
new file mode 100644
index 00000000000..f61ba1b8219
--- /dev/null
+++ b/components/script/dom/webidls/EventModifierInit.webidl
@@ -0,0 +1,22 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// https://w3c.github.io/uievents/#dictdef-eventmodifierinit
+dictionary EventModifierInit : UIEventInit {
+    boolean ctrlKey = false;
+    boolean shiftKey = false;
+    boolean altKey = false;
+    boolean metaKey = false;
+    boolean keyModifierStateAltGraph = false;
+    boolean keyModifierStateCapsLock = false;
+    boolean keyModifierStateFn = false;
+    boolean keyModifierStateFnLock = false;
+    boolean keyModifierStateHyper = false;
+    boolean keyModifierStateNumLock = false;
+    boolean keyModifierStateOS = false;
+    boolean keyModifierStateScrollLock = false;
+    boolean keyModifierStateSuper = false;
+    boolean keyModifierStateSymbol = false;
+    boolean keyModifierStateSymbolLock = false;
+};