GPU compositing surface handle is no longer sent to renderer process.

content/renderer/gpu/webgraphicscontext3d_command_buffer_impl.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if defined(ENABLE_GPU)
 
 #include "content/renderer/gpu/webgraphicscontext3d_command_buffer_impl.h"
 
 #include <GLES2/gl2.h>
 #ifndef GL_GLEXT_PROTOTYPES
@@ skipping 95 matching lines @@
 
   RendererGLContext* parent_context = NULL;
   if (render_directly_to_web_view) {
     RenderView* renderview = RenderView::FromWebView(web_view);
     if (!renderview)
       return false;
 
     web_view_ = web_view;
     context_ = RendererGLContext::CreateViewContext(
         host,
-        renderview->compositing_surface(),
         renderview->routing_id(),
         preferred_extensions,
         attribs,
         active_url);
     if (context_) {
       context_->SetSwapBuffersCallback(
           NewCallback(this,
               &WebGraphicsContext3DCommandBufferImpl::OnSwapBuffersComplete));
     }
   } else {
@@ skipping 904 matching lines @@
     context_lost_callback_->onContextLost();
   }
 
   RenderView* renderview =
       web_view_ ? RenderView::FromWebView(web_view_) : NULL;
   if (renderview)
     renderview->OnViewContextSwapBuffersAborted();
 }
 
 #endif  // defined(ENABLE_GPU)