Avoid leaking objects between isolated worlds via attribute event listeners

Source/core/page/DOMWindow.h

 /*
  * Copyright (C) 2006, 2007, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  *
  * 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.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 316 matching lines @@
         DEFINE_ATTRIBUTE_EVENT_LISTENER(suspend);
         DEFINE_ATTRIBUTE_EVENT_LISTENER(timeupdate);
         DEFINE_ATTRIBUTE_EVENT_LISTENER(unload);
         DEFINE_ATTRIBUTE_EVENT_LISTENER(volumechange);
         DEFINE_ATTRIBUTE_EVENT_LISTENER(waiting);
 
         DEFINE_MAPPED_ATTRIBUTE_EVENT_LISTENER(webkitanimationstart, webkitAnimationStart);
         DEFINE_MAPPED_ATTRIBUTE_EVENT_LISTENER(webkitanimationiteration, webkitAnimationIteration);
         DEFINE_MAPPED_ATTRIBUTE_EVENT_LISTENER(webkitanimationend, webkitAnimationEnd);
         DEFINE_MAPPED_ATTRIBUTE_EVENT_LISTENER(webkittransitionend, webkitTransitionEnd);
-        DEFINE_MAPPED_ATTRIBUTE_EVENT_LISTENER(transitionend, transitionend);
+        DEFINE_ATTRIBUTE_EVENT_LISTENER(transitionend);
 
         void finishedLoading();
 
         using RefCounted<DOMWindow>::ref;
         using RefCounted<DOMWindow>::deref;
 
         DEFINE_ATTRIBUTE_EVENT_LISTENER(devicemotion);
         DEFINE_ATTRIBUTE_EVENT_LISTENER(deviceorientation);
 
         // HTML 5 key/value storage
@@ skipping 93 matching lines @@
     }
 
     inline String DOMWindow::defaultStatus() const
     {
         return m_defaultStatus;
     } 
 
 } // namespace WebCore
 
 #endif // DOMWindow_h