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

Source/WebCore/dom/CompositionEvent.cpp

 /*
  * Copyright (C) 2009 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 19 matching lines @@
 #include "EventNames.h"
 
 namespace WebCore {
 
 CompositionEventInit::CompositionEventInit()
 {
 }
 
 CompositionEvent::CompositionEvent()
 {
+    ScriptWrappable::init(this);
 }
 
 CompositionEvent::CompositionEvent(const AtomicString& type, PassRefPtr<AbstractView> view, const String& data)
     : UIEvent(type, true, true, view, 0)
     , m_data(data)
 {
+    ScriptWrappable::init(this);
 }
 
 CompositionEvent::CompositionEvent(const AtomicString& type, const CompositionEventInit& initializer)
     : UIEvent(type, initializer)
     , m_data(initializer.data)
 {
+    ScriptWrappable::init(this);
 }
 
 CompositionEvent::~CompositionEvent()
 {
 }
 
 void CompositionEvent::initCompositionEvent(const AtomicString& type, bool canBubble, bool cancelable, PassRefPtr<AbstractView> view, const String& data)
 {
     if (dispatched())
         return;
 
     initUIEvent(type, canBubble, cancelable, view, 0);
 
     m_data = data;
 }
 
 const AtomicString& CompositionEvent::interfaceName() const
 {
     return eventNames().interfaceForCompositionEvent;
 }
 
 } // namespace WebCore