Chromecast: MessageLoopProxy cleanup --> SingleThreadTaskRunner.

chromecast/renderer/media/audio_pipeline_proxy.h

 // Copyright 2014 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 CHROMECAST_RENDERER_MEDIA_AUDIO_PIPELINE_PROXY_H_
 #define CHROMECAST_RENDERER_MEDIA_AUDIO_PIPELINE_PROXY_H_
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/threading/thread_checker.h"
 #include "chromecast/common/media/cma_ipc_common.h"
 #include "chromecast/media/cma/pipeline/audio_pipeline.h"
 #include "media/base/pipeline_status.h"
 
 namespace base {
-class MessageLoopProxy;
+class SingleThreadTaskRunner;
 class SharedMemory;
 }
 
 namespace media {
 class AudioDecoderConfig;
 }
 
 namespace chromecast {
 namespace media {
 class AudioPipelineProxyInternal;
 struct AvPipelineClient;
 class AvStreamerProxy;
 class CodedFrameProvider;
 class MediaChannelProxy;
 
 class AudioPipelineProxy : public AudioPipeline {
  public:
-  AudioPipelineProxy(
-      scoped_refptr<base::MessageLoopProxy> io_message_loop_proxy,
-      scoped_refptr<MediaChannelProxy> media_channel_proxy);
+  AudioPipelineProxy(scoped_refptr<base::SingleThreadTaskRunner> io_task_runner,
+                     scoped_refptr<MediaChannelProxy> media_channel_proxy);
   ~AudioPipelineProxy() override;
 
   void Initialize(
       const ::media::AudioDecoderConfig& config,
       scoped_ptr<CodedFrameProvider> frame_provider,
       const ::media::PipelineStatusCB& status_cb);
   void StartFeeding();
   void Flush(const base::Closure& done_cb);
   void Stop();
 
   // AudioPipeline implementation.
   void SetClient(const AvPipelineClient& client) override;
   void SetVolume(float volume) override;
 
  private:
   base::ThreadChecker thread_checker_;
 
   void OnAvPipeCreated(
       const ::media::AudioDecoderConfig& config,
       const ::media::PipelineStatusCB& status_cb,
       scoped_ptr<base::SharedMemory> shared_memory);
   void OnPipeWrite();
   void OnPipeRead();
 
-  scoped_refptr<base::MessageLoopProxy> io_message_loop_proxy_;
+  scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_;
 
   // |proxy_| main goal is to convert function calls to IPC messages.
   scoped_ptr<AudioPipelineProxyInternal> proxy_;
 
   scoped_ptr<AvStreamerProxy> audio_streamer_;
 
   base::WeakPtr<AudioPipelineProxy> weak_this_;
   base::WeakPtrFactory<AudioPipelineProxy> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioPipelineProxy);
 };
 
 }  // namespace media
 }  // namespace chromecast
 
 #endif  // CHROMECAST_RENDERER_MEDIA_AUDIO_PIPELINE_PROXY_H_