Process Custom Elements in post-order.

Source/core/dom/CustomElementCallbackDispatcher.h

 /*
  * Copyright (C) 2013 Google 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.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 55 matching lines @@
     };
 
     // Returns true if more work may have to be performed at the
     // checkpoint by this or other workers (for example, this work
     // invoked author scripts)
     bool dispatch();
 
 protected:
     friend class CustomElementCallbackScheduler;
 
-    CustomElementCallbackQueue* createAtFrontOfCurrentElementQueue(PassRefPtr<Element>);
     CustomElementCallbackQueue* ensureInCurrentElementQueue(PassRefPtr<Element>);
 
 private:
     CustomElementCallbackDispatcher()
     {
         // Add a null element as a sentinel. This makes it possible to
         // identify elements queued when there is no
         // CallbackDeliveryScope active. Also, if the processing stack
         // is popped when empty, this sentinel will cause a null deref
         // crash.
@@ skipping 28 matching lines @@
     static const size_t kNumSentinels = 1;
     Vector<CustomElementCallbackQueue*> m_flattenedProcessingStack;
 
     typedef HashMap<Element*, OwnPtr<CustomElementCallbackQueue> > ElementCallbackQueueMap;
     ElementCallbackQueueMap m_elementCallbackQueueMap;
 };
 
 }
 
 #endif // CustomElementCallbackDispatcher_h