Revert the merge. Mac build is mysteriously broken.

third_party/WebKit/WebCore/loader/MediaDocument.cpp

 /*
  * Copyright (C) 2008 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 129 matching lines @@
 
 Tokenizer* MediaDocument::createTokenizer()
 {
     return new MediaTokenizer(this);
 }
 
 void MediaDocument::defaultEventHandler(Event* event)
 {
     // Match the default Quicktime plugin behavior to allow 
     // clicking and double-clicking to pause and play the media.
-    Node* targetNode = event->target()->toNode();
+    EventTargetNode* targetNode = event->target()->toNode();
     if (targetNode && targetNode->hasTagName(videoTag)) {
         HTMLVideoElement* video = static_cast<HTMLVideoElement*>(targetNode);
         ExceptionCode ec;
         if (event->type() == eventNames().clickEvent) {
             if (!video->canPlay()) {
                 video->pause(ec);
                 event->setDefaultHandled();
             }
         } else if (event->type() == eventNames().dblclickEvent) {
             if (video->canPlay()) {
                 video->play(ec);
                 event->setDefaultHandled();
             }
         }
     }
 }
 
 }
 #endif