Bookkeep the pointer event listeners added to page

third_party/WebKit/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 131 matching lines @@
     sequence<DOMString> userPreferredLanguages();
     void setUserPreferredLanguages(sequence<DOMString> languages);
 
     unsigned long mediaKeysCount();
     unsigned long mediaKeySessionCount();
     unsigned long suspendableObjectCount(Document document);
     unsigned long wheelEventHandlerCount(Document document);
     unsigned long scrollEventHandlerCount(Document document);
     unsigned long touchStartOrMoveEventHandlerCount(Document document);
     unsigned long touchEndOrCancelEventHandlerCount(Document document);
+    unsigned long pointerEventHandlerCount(Document document);
     [RaisesException] LayerRectList touchEventTargetLayerRects(Document document);
 
     [RaisesException] boolean executeCommand(Document document, DOMString name, DOMString value);
 
     DOMString htmlNamespace();
     sequence<DOMString> htmlTags();
     DOMString svgNamespace();
     sequence<DOMString> svgTags();
 
     [RaisesException] NodeList nodesFromRect(Document document, long x, long y,
@@ skipping 210 matching lines @@
     DOMString getProgrammaticScrollAnimationState(Node node);
 
     ClientRect visualRect(Node node);
 
     OriginTrialsTest originTrialsTest();
 
     void crash();
 
     void setIsLowEndDevice(boolean isLowEndDevice);
 };