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

content/common/gpu/client/gpu_channel_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_COMMON_GPU_CLIENT_GPU_CHANNEL_HOST_H_
 #define CONTENT_COMMON_GPU_CLIENT_GPU_CHANNEL_HOST_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 17 matching lines @@
 #include "ui/gfx/gpu_memory_buffer.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gl/gpu_preference.h"
 
 class GURL;
 class TransportTextureService;
 struct GPUCreateCommandBufferConfig;
 
 namespace base {
 class MessageLoop;
+class MessageLoopProxy;
 class WaitableEvent;
 }
 
 namespace IPC {
 class SyncMessageFilter;
 }
 
 namespace media {
 class VideoDecodeAccelerator;
 class VideoEncodeAccelerator;
 }
 
 namespace gpu {
 class GpuMemoryBufferManager;
 }
 
 namespace content {
 class CommandBufferProxyImpl;
 class GpuChannelHost;
 
 struct GpuListenerInfo {
   GpuListenerInfo();
   ~GpuListenerInfo();
 
   base::WeakPtr<IPC::Listener> listener;
-  scoped_refptr<base::SingleThreadTaskRunner> task_runner;
+  scoped_refptr<base::MessageLoopProxy> loop;
 };
 
 struct ProxyFlushInfo {
   ProxyFlushInfo();
   ~ProxyFlushInfo();
 
   bool flush_pending;
   int route_id;
   int32 put_offset;
   unsigned int flush_count;
   std::vector<ui::LatencyInfo> latency_info;
 };
 
 class CONTENT_EXPORT GpuChannelHostFactory {
  public:
   virtual ~GpuChannelHostFactory() {}
 
   virtual bool IsMainThread() = 0;
-  virtual scoped_refptr<base::SingleThreadTaskRunner>
-  GetIOThreadTaskRunner() = 0;
+  virtual scoped_refptr<base::MessageLoopProxy> GetIOLoopProxy() = 0;
   virtual scoped_ptr<base::SharedMemory> AllocateSharedMemory(size_t size) = 0;
   virtual CreateCommandBufferResult CreateViewCommandBuffer(
       int32 surface_id,
       const GPUCreateCommandBufferConfig& init_params,
       int32 route_id) = 0;
 };
 
 // Encapsulates an IPC channel between the client and one GPU process.
 // On the GPU process side there's a corresponding GpuChannel.
 // Every method can be called on any thread with a message loop, except for the
@@ skipping 106 matching lines @@
   // A filter used internally to route incoming messages from the IO thread
   // to the correct message loop. It also maintains some shared state between
   // all the contexts.
   class MessageFilter : public IPC::MessageFilter {
    public:
     MessageFilter();
 
     // Called on the IO thread.
     void AddRoute(int route_id,
                   base::WeakPtr<IPC::Listener> listener,
-                  scoped_refptr<base::SingleThreadTaskRunner> task_runner);
+                  scoped_refptr<base::MessageLoopProxy> loop);
     // Called on the IO thread.
     void RemoveRoute(int route_id);
 
     // IPC::MessageFilter implementation
     // (called on the IO thread):
     bool OnMessageReceived(const IPC::Message& msg) override;
     void OnChannelError() override;
 
     // The following methods can be called on any thread.
 
@@ skipping 48 matching lines @@
   typedef base::hash_map<int, CommandBufferProxyImpl*> ProxyMap;
   ProxyMap proxies_;
   ProxyFlushInfo flush_info_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuChannelHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_CLIENT_GPU_CHANNEL_HOST_H_