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

Source/WebCore/html/HTMLCanvasElement.cpp

 /*
  * Copyright (C) 2004, 2006, 2007 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alp Toker <alp@atoker.com>
  * Copyright (C) 2010 Torch Mobile (Beijing) Co. Ltd. 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.
@@ skipping 64 matching lines @@
     : HTMLElement(tagName, document)
     , m_size(DefaultWidth, DefaultHeight)
     , m_rendererIsCanvas(false)
     , m_ignoreReset(false)
     , m_deviceScaleFactor(targetDeviceScaleFactor())
     , m_originClean(true)
     , m_hasCreatedImageBuffer(false)
     , m_didClearImageBuffer(false)
 {
     ASSERT(hasTagName(canvasTag));
+    ScriptWrappable::init(this);
 }
 
 PassRefPtr<HTMLCanvasElement> HTMLCanvasElement::create(Document* document)
 {
     return adoptRef(new HTMLCanvasElement(canvasTag, document));
 }
 
 PassRefPtr<HTMLCanvasElement> HTMLCanvasElement::create(const QualifiedName& tagName, Document* document)
 {
     return adoptRef(new HTMLCanvasElement(tagName, document));
@@ skipping 500 matching lines @@
     HTMLElement::reportMemoryUsage(memoryObjectInfo);
     info.addMember(m_observers, "observers");
     info.addMember(m_context, "context");
     info.addMember(m_imageBuffer, "imageBuffer");
     info.addMember(m_contextStateSaver, "contextStateSaver");
     info.addMember(m_presentedImage, "presentedImage");
     info.addMember(m_copiedImage, "copiedImage");
 }
 
 }