Have ElementTraversal / NodeTraversal's next() methods take a reference

Source/core/html/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 116 matching lines @@
 
 PassRefPtr<DocumentParser> MediaDocument::createParser()
 {
     return MediaDocumentParser::create(this);
 }
 
 static inline HTMLVideoElement* descendentVideoElement(Node* root)
 {
     ASSERT(root);
 
-    for (Node* node = root; node; node = NodeTraversal::next(node, root)) {
+    for (Node* node = root; node; node = NodeTraversal::next(*node, root)) {
         if (isHTMLVideoElement(node))
             return toHTMLVideoElement(node);
     }
 
     return 0;
 }
 
 void MediaDocument::defaultEventHandler(Event* event)
 {
     Node* targetNode = event->target()->toNode();
@@ skipping 12 matching lines @@
                 if (video->canPlay())
                     video->play();
             } else
                 video->pause();
             event->setDefaultHandled();
         }
     }
 }
 
 }