Rework compositor touch hit testing

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 121 matching lines @@
     [RaisesException] ClientRect bestZoomableAreaForTouchPoint(long x, long y, long width, long height, Document document);
 
     [RaisesException] long lastSpellCheckRequestSequence(Document document);
     [RaisesException] long lastSpellCheckProcessedSequence(Document document);
 
     sequence<DOMString> userPreferredLanguages();
     void setUserPreferredLanguages(sequence<DOMString> languages);
 
     [RaisesException] unsigned long wheelEventHandlerCount(Document document);
     [RaisesException] unsigned long touchEventHandlerCount(Document document);
-    [RaisesException] ClientRectList touchEventTargetClientRects(Document document);
+    [RaisesException] LayerRectList touchEventTargetLayerRects(Document document);
+    [RaisesException] unsigned long touchEventTargetLayerRectsUpdateCount(Document document);
 
     [RaisesException] NodeList nodesFromRect(Document document, long x, long y,
         unsigned long topPadding, unsigned long rightPadding, unsigned long bottomPadding, unsigned long leftPadding,
         boolean ignoreClipping, boolean allowShadowContent, boolean allowChildFrameContent);
 
     void emitInspectorDidBeginFrame();
     void emitInspectorDidCancelFrame();
 
     [RaisesException] boolean hasSpellingMarker(Document document, long from, long length);
     [RaisesException] boolean hasGrammarMarker(Document document, long from, long length);
@@ skipping 96 matching lines @@
     void forceReload(boolean endToEnd);
 
     void enableMockSpeechSynthesizer();
 
     [RaisesException] DOMString getImageSourceURL(Element element);
 
     boolean isSelectPopupVisible(Node node);
 
     [RaisesException] ClientRect selectionBounds();
 };