Remove GPU relinquish resources infrastructure and stop GPU process.

content/browser/gpu/gpu_process_host.h

Index: content/browser/gpu/gpu_process_host.h
diff --git a/content/browser/gpu/gpu_process_host.h b/content/browser/gpu/gpu_process_host.h
index 7df522a80b6c87619432e93ae66af269643e03a4..720761739c07f0d7c9cdfd6084f99e9724191d46 100644
--- a/content/browser/gpu/gpu_process_host.h
+++ b/content/browser/gpu/gpu_process_host.h
@@ -141,8 +141,12 @@ class GpuProcessHost : public BrowserChildProcessHostDelegate,
   // 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);
@@ -164,6 +168,7 @@ class GpuProcessHost : public BrowserChildProcessHostDelegate,
   bool OnMessageReceived(const IPC::Message& message) override;
   void OnChannelConnected(int32 peer_pid) override;
   void OnProcessLaunched() override;
+  void OnProcessLaunchFailed() override;
   void OnProcessCrashed(int exit_code) override;
 
   // Message handlers.
@@ -238,9 +243,6 @@ class GpuProcessHost : public BrowserChildProcessHostDelegate,
   // 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.