Make EventHandler::ActiveIntervalTimer mockable.

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 115 matching lines @@
     [RaisesException] unsigned long locationFromRange(Element scope, Range range);
     [RaisesException] unsigned long lengthFromRange(Element scope, Range range);
     [RaisesException] DOMString rangeAsText(Range range);
 
     [RaisesException] WebKitPoint touchPositionAdjustedToBestClickableNode(long x, long y, long width, long height, Document document);
     [RaisesException] Node touchNodeAdjustedToBestClickableNode(long x, long y, long width, long height, Document document);
     [RaisesException] WebKitPoint touchPositionAdjustedToBestContextMenuNode(long x, long y, long width, long height, Document document);
     [RaisesException] Node touchNodeAdjustedToBestContextMenuNode(long x, long y, long width, long height, Document document);
     [RaisesException] ClientRect bestZoomableAreaForTouchPoint(long x, long y, long width, long height, Document document);
 
+    [RaisesException] void suspendActiveIntervalTimer(Document document);
+    [RaisesException] void resumeActiveIntervalTimer(Document document);
+    [RaisesException] void fireActiveIntervalTimer(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] LayerRectList touchEventTargetLayerRects(Document document);
 
@@ skipping 120 matching lines @@
     boolean isSelectPopupVisible(Node node);
 
     [RaisesException] ClientRect selectionBounds();
 
     boolean loseSharedGraphicsContext3D();
 
     [RaisesException] void forceCompositingUpdate(Document document);
 
     void setZoomFactor(float factor);
 };