Oilpan: move 2D Canvas and WebGL objects to the heap.

Source/core/html/canvas/WebGLDrawBuffers.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 27 matching lines @@
 
 WebGLDrawBuffers::~WebGLDrawBuffers()
 {
 }
 
 WebGLExtensionName WebGLDrawBuffers::name() const
 {
     return WebGLDrawBuffersName;
 }
 
-PassRefPtr<WebGLDrawBuffers> WebGLDrawBuffers::create(WebGLRenderingContextBase* context)
+PassRefPtrWillBeRawPtr<WebGLDrawBuffers> WebGLDrawBuffers::create(WebGLRenderingContextBase* context)
 {
-    return adoptRef(new WebGLDrawBuffers(context));
+    return adoptRefWillBeNoop(new WebGLDrawBuffers(context));
 }
 
 // static
 bool WebGLDrawBuffers::supported(WebGLRenderingContextBase* context)
 {
     return (context->extensionsUtil()->supportsExtension("GL_EXT_draw_buffers")
         && satisfiesWebGLRequirements(context));
 }
 
 const char* WebGLDrawBuffers::extensionName()
@@ skipping 110 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 blink