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

content/renderer/render_thread_impl.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_RENDERER_RENDER_THREAD_IMPL_H_
 #define CONTENT_RENDERER_RENDER_THREAD_IMPL_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 409 matching lines @@
  protected:
   virtual void SetResourceDispatchTaskQueue(
     const scoped_refptr<base::SingleThreadTaskRunner>& resource_task_queue);
 
  private:
   // ChildThread
   bool OnControlMessageReceived(const IPC::Message& msg) override;
 
   // GpuChannelHostFactory implementation:
   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;
 
   void Init();
 
   void OnCreateNewFrame(FrameMsg_NewFrame_Params params);
   void OnCreateNewFrameProxy(int routing_id,
@@ skipping 97 matching lines @@
   bool layout_test_mode_;
 
   // Timer that periodically calls IdleHandler.
   base::RepeatingTimer<RenderThreadImpl> idle_timer_;
 
   // The channel from the renderer process to the GPU process.
   scoped_refptr<GpuChannelHost> gpu_channel_;
 
   // Cache of variables that are needed on the compositor thread by
   // GpuChannelHostFactory methods.
-  scoped_refptr<base::SingleThreadTaskRunner> io_thread_task_runner_;
+  scoped_refptr<base::MessageLoopProxy> io_message_loop_proxy_;
 
   // The message loop of the renderer main thread.
   // This message loop should be destructed before the RenderThreadImpl
   // shuts down Blink.
   scoped_ptr<base::MessageLoop> main_message_loop_;
 
   // A lazily initiated thread on which file operations are run.
   scoped_ptr<base::Thread> file_thread_;
 
   // May be null if overridden by ContentRendererClient.
@@ skipping 88 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(RenderThreadImpl);
 };
 
 #if defined(COMPILER_MSVC)
 #pragma warning(pop)
 #endif
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_THREAD_IMPL_H_