Make EstablishGpuChannel synchronous. Remove obsolete Synchronize msg.

content/common/gpu/gpu_channel_manager.h

 // 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.
 
 #ifndef CONTENT_GPU_GPU_CHANNEL_MANAGER_H_
 #define CONTENT_GPU_GPU_CHANNEL_MANAGER_H_
 #pragma once
 
 #include <string>
 
@@ skipping 50 matching lines @@
   void LoseAllContexts();
 
   ScopedRunnableMethodFactory<GpuChannelManager> method_factory_;
 
  private:
   // Message handlers.
   void OnEstablishChannel(int renderer_id);
   void OnCloseChannel(const IPC::ChannelHandle& channel_handle);
   void OnVisibilityChanged(
       int32 render_view_id, int32 renderer_id, bool visible);
-  void OnSynchronize();
   void OnCreateViewCommandBuffer(
       gfx::PluginWindowHandle window,
       int32 render_view_id,
       int32 renderer_id,
       const GPUCreateCommandBufferConfig& init_params);
   void OnResizeViewACK(int32 renderer_id, int32 command_buffer_route_id);
 #if defined(OS_MACOSX)
   void OnAcceleratedSurfaceBuffersSwappedACK(
       int renderer_id, int32 route_id, uint64 swap_buffers_count);
   void OnDestroyCommandBuffer(int renderer_id, int32 renderer_view_id);
@@ skipping 13 matching lines @@
   // one channel for each renderer process that has connected to this GPU
   // process.
   typedef base::hash_map<int, scoped_refptr<GpuChannel> > GpuChannelMap;
   GpuChannelMap gpu_channels_;
   GpuWatchdog* watchdog_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuChannelManager);
 };
 
 #endif  // CONTENT_GPU_GPU_CHANNEL_MANAGER_H_