Make WebGL objects scriptwrappable so that binding integrity checks may be applied to them.

Source/core/html/canvas/EXTDrawBuffers.h

 /*
  * Copyright (C) 2013 Google 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
  *     documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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 #ifndef EXTDrawBuffers_h
 #define EXTDrawBuffers_h
 
+#include "bindings/v8/ScriptWrappable.h"
 #include "core/html/canvas/WebGLExtension.h"
-#include <wtf/PassOwnPtr.h>
+#include "wtf/PassOwnPtr.h"
 
 namespace WebCore {
 
-class EXTDrawBuffers : public WebGLExtension {
+class EXTDrawBuffers : public WebGLExtension, public ScriptWrappable {
 public:
     static PassOwnPtr<EXTDrawBuffers> create(WebGLRenderingContext*);
     static bool supported(WebGLRenderingContext*);
     static const char* getExtensionName();
 
     virtual ~EXTDrawBuffers();
     virtual ExtensionName getName() const;
 
     void drawBuffersEXT(const Vector<GC3Denum>& buffers);
 
 private:
     EXTDrawBuffers(WebGLRenderingContext*);
 
     static bool satisfiesWebGLRequirements(WebGLRenderingContext*);
 };
 
 } // namespace WebCore
 
 #endif // EXTDrawBuffers_h