Remove CanvasRenderingContext from the web exposed objects

Source/core/html/canvas/CanvasRenderingContext.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 "core/html/HTMLImageElement.h"
 #include "core/html/HTMLVideoElement.h"
 #include "core/html/canvas/CanvasPattern.h"
 #include "platform/weborigin/SecurityOrigin.h"
 
 namespace WebCore {
 
 CanvasRenderingContext::CanvasRenderingContext(HTMLCanvasElement* canvas)
     : m_canvas(canvas)
 {
-    ScriptWrappable::init(this);

[Inactive, 2014/02/28 23:27:09]

I believe this should be moved to the 2 subclasses. I see that the 2 subclasses
now inherit ScriptWrappable but I don't think you moved this part?

[Inactive, 2014/02/28 23:32:15]

Hmm, never mind, it was already there, which is why I don't see it in this
patch.

+
 }
 
 bool CanvasRenderingContext::wouldTaintOrigin(const CanvasPattern* pattern)
 {
     if (canvas()->originClean() && pattern && !pattern->originClean())
         return true;
     return false;
 }
 
 bool CanvasRenderingContext::wouldTaintOrigin(const HTMLCanvasElement* sourceCanvas)
@@ skipping 48 matching lines @@
     return false;
 }
 
 void CanvasRenderingContext::checkOrigin(const KURL& url)
 {
     if (wouldTaintOrigin(url))
         canvas()->setOriginTainted();
 }
 
 } // namespace WebCore