Gpu process restart fix.

chrome/renderer/gpu_channel_host.h

 // Copyright (c) 2010 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 CHROME_RENDERER_GPU_CHANNEL_HOST_H_
 #define CHROME_RENDERER_GPU_CHANNEL_HOST_H_
 #pragma once
 
 #include <string>
 #include <vector>
@@ skipping 30 matching lines @@
 
   // Called on the render thread
   GpuChannelHost();
   ~GpuChannelHost();
 
   // Connect to GPU process channel.
   void Connect(const IPC::ChannelHandle& channel_handle);
 
   State state() const { return state_; }
 
+  // Change state to kLost.
+  void SetStateLost();
+
   // The GPU stats reported by the GPU process.
   void set_gpu_info(const GPUInfo& gpu_info);
   const GPUInfo& gpu_info() const;
 
   // IPC::Channel::Listener implementation:
   virtual bool OnMessageReceived(const IPC::Message& msg);
   virtual void OnChannelConnected(int32 peer_pid);
   virtual void OnChannelError();
 
   // IPC::Message::Sender implementation:
@@ skipping 38 matching lines @@
   ProxyMap proxies_;
 
   // This is a MessageFilter to intercept IPC messages and distribute them
   // to the corresponding GpuVideoDecoderHost.
   scoped_refptr<GpuVideoServiceHost> gpu_video_service_host_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuChannelHost);
 };
 
 #endif  // CHROME_RENDERER_GPU_CHANNEL_HOST_H_