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

Source/WebCore/dom/PageTransitionEvent.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 20 matching lines @@
 namespace WebCore {
 
 PageTransitionEventInit::PageTransitionEventInit()
     : persisted(false)
 {
 }
 
 PageTransitionEvent::PageTransitionEvent()
     : m_persisted(false)
 {
+    ScriptWrappable::init(this);
 }
 
 PageTransitionEvent::PageTransitionEvent(const AtomicString& type, bool persisted)
     : Event(type, true, true)
     , m_persisted(persisted)
 {
+    ScriptWrappable::init(this);
 }
 
 PageTransitionEvent::PageTransitionEvent(const AtomicString& type, const PageTransitionEventInit& initializer)
     : Event(type, initializer)
     , m_persisted(initializer.persisted)
 {
+    ScriptWrappable::init(this);
 }
 
 PageTransitionEvent::~PageTransitionEvent()
 {
 }
 
 const AtomicString& PageTransitionEvent::interfaceName() const
 {
     return eventNames().interfaceForPageTransitionEvent;
 }
 
 } // namespace WebCore