Revert of content/common: Remove use of MessageLoopProxy and deprecated MessageLoop APIs

content/browser/gpu/browser_gpu_channel_host_factory.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_BROWSER_GPU_CHANNEL_HOST_FACTORY_H_
 #define CONTENT_BROWSER_GPU_BROWSER_GPU_CHANNEL_HOST_FACTORY_H_
 
 #include <map>
 #include <vector>
 
@@ skipping 15 matching lines @@
   static BrowserGpuChannelHostFactory* instance() { return instance_; }
 
   static void EnableGpuMemoryBufferFactoryUsage(
       gfx::GpuMemoryBuffer::Usage usage);
   static bool IsGpuMemoryBufferFactoryUsageEnabled(
       gfx::GpuMemoryBuffer::Usage usage);
   static uint32 GetImageTextureTarget();
 
   // Overridden from GpuChannelHostFactory:
   bool IsMainThread() override;
-  scoped_refptr<base::SingleThreadTaskRunner> GetIOThreadTaskRunner() override;
+  scoped_refptr<base::MessageLoopProxy> GetIOLoopProxy() override;
   scoped_ptr<base::SharedMemory> AllocateSharedMemory(size_t size) override;
   CreateCommandBufferResult CreateViewCommandBuffer(
       int32 surface_id,
       const GPUCreateCommandBufferConfig& init_params,
       int32 route_id) override;
 
   // Overridden from GpuMemoryBufferFactoryHost:
   bool IsGpuMemoryBufferConfigurationSupported(
       gfx::GpuMemoryBuffer::Format format,
       gfx::GpuMemoryBuffer::Usage usage) override;
@@ skipping 57 matching lines @@
   CreateGpuMemoryBufferCallbackMap create_gpu_memory_buffer_requests_;
 
   static BrowserGpuChannelHostFactory* instance_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserGpuChannelHostFactory);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_GPU_BROWSER_GPU_CHANNEL_HOST_FACTORY_H_