gpu: Some code cleanups.

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 90 matching lines @@
                      mojo::ScopedMessagePipeHandle interface_pipe);
 
   // Get the GPU process host for the GPU process with the given ID. Returns
   // null if the process no longer exists.
   static GpuProcessHost* FromID(int host_id);
   int host_id() const { return host_id_; }
 
   // IPC::Sender implementation.
   bool Send(IPC::Message* msg) override;
 
-  // Adds a message filter to the GpuProcessHost's channel.
-  void AddFilter(IPC::MessageFilter* filter);
-
   // Tells the GPU process to create a new channel for communication with a
   // client. Once the GPU process responds asynchronously with the IPC handle
   // and GPUInfo, we call the callback.
   void EstablishGpuChannel(int client_id,
                            uint64_t client_tracing_id,
                            bool preempts,
                            bool allow_view_command_buffers,
                            bool allow_real_time_streams,
                            const EstablishChannelCallback& callback);
 
@@ skipping 164 matching lines @@
   gpu::GpuProcessHostActivityFlags activity_flags_;
 
   base::WeakPtrFactory<GpuProcessHost> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuProcessHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_GPU_GPU_PROCESS_HOST_H_