Check for a restarted GPU process in OnCreateViewCommandBuffer.

content/browser/renderer_host/gpu_message_filter.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_BROWSER_RENDERER_HOST_GPU_MESSAGE_FILTER_H_
 #define CONTENT_BROWSER_RENDERER_HOST_GPU_MESSAGE_FILTER_H_
 
 #include <vector>
 
 #include "base/memory/linked_ptr.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/sequenced_task_runner_helpers.h"
 #include "content/common/gpu/gpu_process_launch_causes.h"
 #include "content/public/browser/browser_message_filter.h"
 #include "ui/gfx/native_widget_types.h"
 
-class GpuProcessHost;
 struct GPUCreateCommandBufferConfig;
 
 namespace gpu {
 struct GPUInfo;
 }
 
 namespace content {
+class GpuProcessHost;
 class RenderWidgetHelper;
 class RenderWidgetHostViewFrameSubscriber;
 
 // A message filter for messages from the renderer to the GpuProcessHost(UIShim)
 // in the browser. Such messages are typically destined for the GPU process,
 // but need to be mediated by the browser.
 class GpuMessageFilter : public BrowserMessageFilter {
  public:
   GpuMessageFilter(int render_process_id,
                    RenderWidgetHelper* render_widget_helper);
@@ skipping 10 matching lines @@
   void EndFrameSubscription(int route_id);
 
  private:
   friend class BrowserThread;
   friend class base::DeleteHelper<GpuMessageFilter>;
   struct CreateViewCommandBufferRequest;
   struct FrameSubscription;
 
   virtual ~GpuMessageFilter();
 
+  GpuProcessHost* GetGpuProcessHost(CauseForGpuLaunch cause_for_gpu_launch);
+
   // Message handlers called on the browser IO thread:
   void OnEstablishGpuChannel(CauseForGpuLaunch,
                              IPC::Message* reply);
   void OnCreateViewCommandBuffer(
       int32 surface_id,
       const GPUCreateCommandBufferConfig& init_params,
       int32 route_id,
       IPC::Message* reply);
   // Helper callbacks for the message handlers.
   void EstablishChannelCallback(scoped_ptr<IPC::Message> reply,
@@ skipping 18 matching lines @@
 
   typedef std::vector<linked_ptr<FrameSubscription> > FrameSubscriptionList;
   FrameSubscriptionList frame_subscription_list_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuMessageFilter);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_GPU_MESSAGE_FILTER_H_