aura: Remove CreateOffscreenContext from ui::ContextFactory.

content/browser/aura/gpu_process_transport_factory.cc

 // Copyright (c) 2013 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.
 
 #include "content/browser/aura/gpu_process_transport_factory.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 215 matching lines @@
   // Make sure the lost context callback doesn't try to run during destruction.
   callback_factory_.InvalidateWeakPtrs();
 }
 
 scoped_ptr<WebGraphicsContext3DCommandBufferImpl>
 GpuProcessTransportFactory::CreateOffscreenCommandBufferContext() {
   base::WeakPtr<WebGraphicsContext3DSwapBuffersClient> swap_client;
   return CreateContextCommon(swap_client, 0);
 }
 
-scoped_ptr<WebKit::WebGraphicsContext3D>
-GpuProcessTransportFactory::CreateOffscreenContext() {
-  return CreateOffscreenCommandBufferContext()
-      .PassAs<WebKit::WebGraphicsContext3D>();
-}
-
 scoped_ptr<cc::OutputSurface> GpuProcessTransportFactory::CreateOutputSurface(
     ui::Compositor* compositor) {
   PerCompositorData* data = per_compositor_data_[compositor];
   if (!data)
     data = CreatePerCompositorData(compositor);
 
   scoped_ptr<WebGraphicsContext3DCommandBufferImpl> context;
   CommandLine* command_line = CommandLine::ForCurrentProcess();
   if (!command_line->HasSwitch(switches::kUIEnableSoftwareCompositing)) {
     context =
@@ skipping 266 matching lines @@
   shared_contexts_main_thread_ = NULL;
 
   scoped_ptr<GLHelper> old_helper(gl_helper_.release());
 
   FOR_EACH_OBSERVER(ImageTransportFactoryObserver,
                     observer_list_,
                     OnLostResources());
 }
 
 }  // namespace content