Added check for leaking AXObjects

Source/core/testing/Internals.cpp

 /*
  * 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 1443 matching lines @@
 unsigned Internals::numberOfLiveNodes() const
 {
     return InspectorCounters::counterValue(InspectorCounters::NodeCounter);
 }
 
 unsigned Internals::numberOfLiveDocuments() const
 {
     return InspectorCounters::counterValue(InspectorCounters::DocumentCounter);
 }
 
+unsigned Internals::numberOfLiveAXObjects() const
+{
+    return AXObjectCache::numberOfLiveAXObjects();
+}
+
 String Internals::dumpRefCountedInstanceCounts() const
 {
     return WTF::dumpRefCountedInstanceCounts();
 }
 
 Vector<String> Internals::consoleMessageArgumentCounts(Document* document) const
 {
     FrameHost* host = document->frameHost();
     if (!host)
         return Vector<String>();
@@ skipping 890 matching lines @@
 
 ClientRectList* Internals::focusRingRects(Element* element)
 {
     Vector<LayoutRect> rects;
     if (element && element->layoutObject())
         element->layoutObject()->addFocusRingRects(rects, LayoutPoint());
     return ClientRectList::create(rects);
 }
 
 } // namespace blink