Merge 92347

Source/WebKit/mac/WebView/WebFullScreenController.mm

 /*
  * Copyright (C) 2010, 2011 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.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 718 matching lines @@
 }
 
 - (BOOL)_isAnyMoviePlaying
 {
     if (!_element)
         return NO;
     
     Node* nextNode = _element.get();
     while (nextNode)
     {
-        if (nextNode->hasTagName(HTMLNames::videoTag)) {
+        if (nextNode->hasTagName(HTMLNames::videoTag) && static_cast<Element*>(nextNode)->isMediaElement()) {
             HTMLMediaElement* element = static_cast<HTMLMediaElement*>(nextNode);
             if (!element->paused() && !element->ended())
                 return YES;
         }
         
         nextNode = nextNode->traverseNextNode(_element.get());
     }
     
     return NO;
 }
@@ skipping 151 matching lines @@
 {
     return this == &listener;
 }
 
 void MediaEventListener::handleEvent(ScriptExecutionContext* context, Event* event)
 {
     [delegate _updatePowerAssertions];
 }
 
 #endif /* ENABLE(FULLSCREEN_API) */