Added check for leaking AXObjects

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 170 matching lines @@
 
     [TypeChecking=Interface] DOMString scrollingStateTreeAsText(Document document);
     [RaisesException, TypeChecking=Interface] DOMString mainThreadScrollingReasons(Document document);
     [RaisesException, TypeChecking=Interface] ClientRectList nonFastScrollableRects(Document document);
 
     [TypeChecking=Interface] void garbageCollectDocumentResources(Document document);
     void evictAllResources();
 
     unsigned long numberOfLiveNodes();
     unsigned long numberOfLiveDocuments();
+    unsigned long numberOfLiveAXObjects();
     DOMString dumpRefCountedInstanceCounts();
     sequence<DOMString> consoleMessageArgumentCounts(Document document);
     unsigned long[] setMemoryCacheCapacities(unsigned long minDeadBytes, unsigned long maxDeadBytes, unsigned long totalBytes);
 
     DOMString counterValue(Element element);
     long pageNumber(Element element, optional float pageWidth, optional float pageHeight);
     DOMString[] shortcutIconURLs(Document document);
     DOMString[] allIconURLs(Document document);
     long numberOfPages(optional double pageWidthInPixels, optional double pageHeightInPixels);
     [RaisesException] DOMString pageProperty(DOMString propertyName, long pageNumber);
@@ skipping 112 matching lines @@
 
     boolean isUseCounted(Document document, long useCounterId);
 
     iterable<long>;
 
     [Unscopeable] readonly attribute DOMString unscopeableAttribute;
     [Unscopeable] DOMString unscopeableMethod();
 
     ClientRectList focusRingRects(Element element);
 };