Remove GPU relinquish resources infrastructure and stop GPU process.

content/browser/gpu/gpu_process_host.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_GPU_GPU_PROCESS_HOST_H_
 #define CONTENT_BROWSER_GPU_GPU_PROCESS_HOST_H_
 
 #include <map>
 #include <queue>
 #include <set>
@@ skipping 123 matching lines @@
                              const CreateGpuMemoryBufferCallback& callback);
 
   // Tells the GPU process to destroy GPU memory buffer.
   void DestroyGpuMemoryBuffer(gfx::GpuMemoryBufferId id,
                               int client_id,
                               int sync_point);
 
   // What kind of GPU process, e.g. sandboxed or unsandboxed.
   GpuProcessKind kind();
 
+  // Forcefully terminates the GPU process.
   void ForceShutdown();
 
+  // Asks the GPU process to stop by itself.
+  void StopGpuProcess();
+
   void BeginFrameSubscription(
       int surface_id,
       base::WeakPtr<RenderWidgetHostViewFrameSubscriber> subscriber);
   void EndFrameSubscription(int surface_id);
   void LoadedShader(const std::string& key, const std::string& data);
 
  private:
   static bool ValidateHost(GpuProcessHost* host);
 
   GpuProcessHost(int host_id, GpuProcessKind kind);
@@ skipping 72 matching lines @@
   GpuProcessKind kind_;
 
   scoped_ptr<base::Thread> in_process_gpu_thread_;
 
   // Whether we actually launched a GPU process.
   bool process_launched_;
 
   // Whether the GPU process successfully initialized.
   bool initialized_;
 
+  // Whether the GPU process is shutting down or not.
+  bool expecting_shutdown_;
+
   // Time Init started.  Used to log total GPU process startup time to UMA.
   base::TimeTicks init_start_time_;
 
   // Whether this host recorded a GPU crash or not.
   bool gpu_crash_recorded_;
 
   // Master switch for enabling/disabling GPU acceleration for the current
   // browser session. It does not change the acceleration settings for
   // existing tabs, just the future ones.
   static bool gpu_enabled_;
@@ skipping 43 matching lines @@
   // IOSurfaces.
   IOSurfaceManagerToken io_surface_manager_token_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(GpuProcessHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_GPU_GPU_PROCESS_HOST_H_