Make echo message per-command-buffer

content/common/gpu/gpu_channel.h

 // Copyright (c) 2012 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_COMMON_GPU_GPU_CHANNEL_H_
 #define CONTENT_COMMON_GPU_GPU_CHANNEL_H_
 #pragma once
 
 #include <deque>
 #include <string>
@@ skipping 109 matching lines @@
   void HandleMessage();
 
   // Message handlers.
   void OnInitialize(base::ProcessHandle renderer_process);
   void OnCreateOffscreenCommandBuffer(
       const gfx::Size& size,
       const GPUCreateCommandBufferConfig& init_params,
       IPC::Message* reply_message);
   void OnDestroyCommandBuffer(int32 route_id, IPC::Message* reply_message);
 
-  void OnEcho(const IPC::Message& message);
-
   void OnWillGpuSwitchOccur(bool is_creating_context,
                             gfx::GpuPreference gpu_preference,
                             IPC::Message* reply_message);
   void OnCloseChannel();
 
   void WillCreateCommandBuffer(gfx::GpuPreference gpu_preference);
   void DidDestroyCommandBuffer(gfx::GpuPreference gpu_preference);
 
   // The lifetime of objects of this class is managed by a GpuChannelManager.
   // The GpuChannelManager destroy all the GpuChannels that they own when they
@@ skipping 35 matching lines @@
   bool handle_messages_scheduled_;
   bool processed_get_state_fast_;
   int32 num_contexts_preferring_discrete_gpu_;
 
   base::WeakPtrFactory<GpuChannel> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuChannel);
 };
 
 #endif  // CONTENT_COMMON_GPU_GPU_CHANNEL_H_