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

Source/WebCore/dom/Attr.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2009, 2010, 2012 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 26 matching lines @@
 
 using namespace HTMLNames;
 
 Attr::Attr(Element* element, const QualifiedName& name)
     : ContainerNode(element->document())
     , m_element(element)
     , m_name(name)
     , m_ignoreChildrenChanged(0)
     , m_specified(true)
 {
+    ScriptWrappable::init(this);
 }
 
 Attr::Attr(Document* document, const QualifiedName& name, const AtomicString& standaloneValue)
     : ContainerNode(document)
     , m_element(0)
     , m_name(name)
     , m_standaloneValue(standaloneValue)
     , m_ignoreChildrenChanged(0)
     , m_specified(true)
 {
+    ScriptWrappable::init(this);
 }
 
 PassRefPtr<Attr> Attr::create(Element* element, const QualifiedName& name)
 {
     RefPtr<Attr> attr = adoptRef(new Attr(element, name));
     attr->createTextChild();
     return attr.release();
 }
 
 PassRefPtr<Attr> Attr::create(Document* document, const QualifiedName& name, const AtomicString& value)
@@ skipping 157 matching lines @@
 }
 
 void Attr::attachToElement(Element* element)
 {
     ASSERT(!m_element);
     m_element = element;
     m_standaloneValue = nullAtom;
 }
 
 }