First part of work to move V8 binding integrity off of vtables.

Source/WebCore/html/HTMLMediaElement.cpp

 /*
  * Copyright (C) 2007, 2008, 2009, 2010, 2011, 2012, 2013 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 478 matching lines @@
     if (!RuntimeEnabledFeatures::webkitVideoTrackEnabled())
         return;
     
     for (Node* node = firstChild(); node; node = node->nextSibling()) {
         if (node->hasTagName(trackTag)) {
             scheduleDelayedAction(LoadTextTrackResource);
             break;
         }
     }
 #endif
+
+    ScriptWrappable::init(this);
 }
 
 bool HTMLMediaElement::rendererIsNeeded(const NodeRenderingContext& context)
 {
 #if ENABLE(PLUGIN_PROXY_FOR_VIDEO)
     UNUSED_PARAM(context);
     Frame* frame = document()->frame();
     if (!frame)
         return false;
 
@@ skipping 4261 matching lines @@
     info.addMember(m_sleepDisabler, "sleepDisabler");
 #endif
 #if ENABLE(WEB_AUDIO)
     info.addMember(m_audioSourceNode, "audioSourceNode");
 #endif
 
 }
 
 }
 #endif