gpu_process_host: Delete some orphaned code

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 <stdint.h>
 
 #include <map>
@@ skipping 157 matching lines @@
 
   // 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);
   ~GpuProcessHost() override;
 
   bool Init();
 
@@ skipping 132 matching lines @@
   // Browser-side Mojo endpoint which sets up a Mojo channel with the child
   // process and contains the browser's ServiceRegistry.
   scoped_ptr<MojoApplicationHost> mojo_application_host_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuProcessHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_GPU_GPU_PROCESS_HOST_H_