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

Source/core/html/canvas/EXTDrawBuffers.cpp

 /*
  * 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
@@ skipping 16 matching lines @@
 
 #include "core/html/canvas/EXTDrawBuffers.h"
 
 #include "core/platform/graphics/Extensions3D.h"
 
 namespace WebCore {
 
 EXTDrawBuffers::EXTDrawBuffers(WebGLRenderingContext* context)
     : WebGLExtension(context)
 {
+    ScriptWrappable::init(this);
     context->graphicsContext3D()->getExtensions()->ensureEnabled("GL_EXT_draw_buffers");
 }
 
 EXTDrawBuffers::~EXTDrawBuffers()
 {
 }
 
 WebGLExtension::ExtensionName EXTDrawBuffers::getName() const
 {
     return WebGLExtension::EXTDrawBuffersName;
@@ skipping 125 matching lines @@
     if (supportsDepth)
         context->deleteTexture(depth);
     if (supportsDepthStencil)
         context->deleteTexture(depthStencil);
     for (size_t i = 0; i < colors.size(); ++i)
         context->deleteTexture(colors[i]);
     return ok;
 }
 
 } // namespace WebCore