gpu: Some code cleanups.

content/browser/gpu/browser_gpu_channel_host_factory.cc

 // 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.
 
 #include "content/browser/gpu/browser_gpu_channel_host_factory.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/location.h"
 #include "base/profiler/scoped_tracker.h"
@@ skipping 347 matching lines @@
       FROM_HERE_WITH_EXPLICIT_FUNCTION(
           "466866 BrowserGpuChannelHostFactory::GpuChannelEstablished2"));
 
   std::vector<gpu::GpuChannelEstablishedCallback> established_callbacks;
   established_callbacks_.swap(established_callbacks);
   for (auto& callback : established_callbacks)
     callback.Run(gpu_channel_);
 }
 
 // static
-void BrowserGpuChannelHostFactory::AddFilterOnIO(
-    int host_id,
-    scoped_refptr<IPC::MessageFilter> filter) {
-  DCHECK_CURRENTLY_ON(BrowserThread::IO);
-
-  GpuProcessHost* host = GpuProcessHost::FromID(host_id);
-  if (host)
-    host->AddFilter(filter.get());

[piman, 2017/04/06 20:51:14]

nit: can we remove GpuProcessHost::AddFilter now? I don't think it's used.

[sadrul, 2017/04/07 02:16:12]

Done.

-}
-
-// static
 void BrowserGpuChannelHostFactory::InitializeShaderDiskCacheOnIO(
     int gpu_client_id,
     const base::FilePath& cache_dir) {
   GetShaderCacheFactorySingleton()->SetCacheInfo(gpu_client_id, cache_dir);
 }
 
 }  // namespace content