Introduce content::ChildMessageFilter.

content/renderer/media/android/renderer_demuxer_android.h

 // Copyright 2013 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_MEDIA_ANDROID_RENDERER_DEMUXER_ANDROID_H_
 #define CONTENT_RENDERER_MEDIA_ANDROID_RENDERER_DEMUXER_ANDROID_H_
 
 #include "base/atomic_sequence_num.h"
 #include "base/id_map.h"
-#include "ipc/ipc_channel_proxy.h"
+#include "content/child/child_message_filter.h"
 #include "media/base/android/demuxer_stream_player_params.h"
 
 namespace content {
 
 class MediaSourceDelegate;
-class ThreadSafeSender;
 
 // Represents the renderer process half of an IPC-based implementation of
 // media::DemuxerAndroid.
 //
 // Refer to BrowserDemuxerAndroid for the browser process half.
-class RendererDemuxerAndroid : public IPC::ChannelProxy::MessageFilter {
+class RendererDemuxerAndroid : public ChildMessageFilter {
  public:
   RendererDemuxerAndroid();
 
   // Returns the next available demuxer client ID for use in IPC messages.
   //
   // Safe to call on any thread.
   int GetNextDemuxerClientID();
 
   // Associates |delegate| with |demuxer_client_id| for handling incoming IPC
   // messages.
   //
   // Must be called on media thread.
   void AddDelegate(int demuxer_client_id, MediaSourceDelegate* delegate);
 
   // Removes the association created by AddDelegate().
   //
   // Must be called on media thread.
   void RemoveDelegate(int demuxer_client_id);
 
-  // IPC::ChannelProxy::MessageFilter overrides.
-  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
+  // ChildMessageFilter overrides.
+  virtual base::TaskRunner* OverrideTaskRunnerForMessage(
+      const IPC::Message& message) OVERRIDE;
+  virtual bool HandleMessage(const IPC::Message& message) OVERRIDE;
 
   // media::DemuxerAndroidClient "implementation".
   //
   // TODO(scherkus): Consider having RendererDemuxerAndroid actually implement
   // media::DemuxerAndroidClient and MediaSourceDelegate actually implement
   // media::DemuxerAndroid.
   void DemuxerReady(int demuxer_client_id,
                     const media::DemuxerConfigs& configs);
   void ReadFromDemuxerAck(int demuxer_client_id,
                           const media::DemuxerData& data);
   void DemuxerSeekDone(int demuxer_client_id);
   void DurationChanged(int demuxer_client_id, const base::TimeDelta& duration);
 
  protected:
   friend class base::RefCountedThreadSafe<RendererDemuxerAndroid>;
   virtual ~RendererDemuxerAndroid();
 
  private:
-  void DispatchMessage(const IPC::Message& message);
   void OnReadFromDemuxer(int demuxer_client_id,
                          media::DemuxerStream::Type type);
   void OnDemuxerSeekRequest(int demuxer_client_id,
                             const base::TimeDelta& time_to_seek);
   void OnMediaConfigRequest(int demuxer_client_id);
 
   base::AtomicSequenceNumber next_demuxer_client_id_;
 
   IDMap<MediaSourceDelegate> delegates_;
-  scoped_refptr<ThreadSafeSender> thread_safe_sender_;
   scoped_refptr<base::MessageLoopProxy> media_message_loop_;
 
   DISALLOW_COPY_AND_ASSIGN(RendererDemuxerAndroid);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_ANDROID_RENDERER_DEMUXER_ANDROID_H_