Add support for setting password value gated on user's gesture in a page

Source/core/testing/Internals.idl

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2013 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 99 matching lines @@
 
     [RaisesException] DOMString viewportAsText(Document document,
                                                float devicePixelRatio,
                                                long availableWidth,
                                                long availableHeight);
 
     [RaisesException] boolean wasLastChangeUserEdit(Element textField);
     [RaisesException] boolean elementShouldAutoComplete(Element inputElement);
     [RaisesException] DOMString suggestedValue(Element inputElement);
     [RaisesException] void setSuggestedValue(Element inputElement, DOMString value);
+    [RaisesException] void setValueAfterUserGesture(Element inputElement, DOMString value);
     [RaisesException] void setEditingValue(Element inputElement, DOMString value);
     [RaisesException] void setAutofilled(Element inputElement, boolean enabled);
 
     [RaisesException] void scrollElementToRect(Element element, long x, long y, long w, long h);
 
     [RaisesException] Range rangeFromLocationAndLength(Element scope, long rangeLocation, long rangeLength);
     [RaisesException] unsigned long locationFromRange(Element scope, Range range);
     [RaisesException] unsigned long lengthFromRange(Element scope, Range range);
     [RaisesException] DOMString rangeAsText(Range range);
 
@@ skipping 152 matching lines @@
     [CallWith=ExecutionContext] Promise createPromise();
     [CallWith=ExecutionContext] Promise createResolvedPromise(any value);
     [CallWith=ExecutionContext] Promise createRejectedPromise(any reason);
     [CallWith=ExecutionContext] Promise addOneToPromise(Promise promise);
 
     void startSpeechInput(Element element);
     void setValueForUser(Element element, DOMString value);
 
     DOMString textSurroundingNode(Node node, long x, long y, unsigned long maxLength);
 };