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

Source/WebCore/Modules/mediastream/RTCDataChannelEvent.cpp

 /*
  * Copyright (C) 2012 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
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 27 matching lines @@
 }
 
 PassRefPtr<RTCDataChannelEvent> RTCDataChannelEvent::create(const AtomicString& type, bool canBubble, bool cancelable, PassRefPtr<RTCDataChannel> channel)
 {
     return adoptRef(new RTCDataChannelEvent(type, canBubble, cancelable, channel));
 }
 
 
 RTCDataChannelEvent::RTCDataChannelEvent()
 {
+    ScriptWrappable::init(this);
 }
 
 RTCDataChannelEvent::RTCDataChannelEvent(const AtomicString& type, bool canBubble, bool cancelable, PassRefPtr<RTCDataChannel> channel)
     : Event(type, canBubble, cancelable)
     , m_channel(channel)
 {
+    ScriptWrappable::init(this);
 }
 
 RTCDataChannelEvent::~RTCDataChannelEvent()
 {
 }
 
 RTCDataChannel* RTCDataChannelEvent::channel() const
 {
     return m_channel.get();
 }
 
 const AtomicString& RTCDataChannelEvent::interfaceName() const
 {
     return eventNames().interfaceForRTCDataChannelEvent;
 }
 
 } // namespace WebCore
 
 #endif // ENABLE(MEDIA_STREAM)