Reland: Remove AudioTrackRenderer

talk/media/base/audiorenderer.h

Index: talk/media/base/audiorenderer.h
diff --git a/talk/media/base/audiorenderer.h b/talk/media/base/audiorenderer.h
index 5c03576fa79d2a593a2013b23035020fe4d1f852..229c36e8b1eccfb57b042ef643fe1c3f232ddaae 100644
--- a/talk/media/base/audiorenderer.h
+++ b/talk/media/base/audiorenderer.h
@@ -55,20 +55,6 @@ class AudioRenderer {
   // to the renderer at a time.
   virtual void SetSink(Sink* sink) {}
 
-  // Add the WebRtc VoE channel to the renderer.
-  // For local stream, multiple WebRtc VoE channels can be connected to the
-  // renderer. While for remote stream, only one WebRtc VoE channel can be
-  // connected to the renderer.
-  // TODO(xians): Remove this interface after Chrome switches to the
-  // AudioRenderer::Sink interface.
-  virtual void AddChannel(int channel_id) {}
-
-  // Remove the WebRtc VoE channel from the renderer.
-  // This method is called when the VoE channel is going away.
-  // TODO(xians): Remove this interface after Chrome switches to the
-  // AudioRenderer::Sink interface.
-  virtual void RemoveChannel(int channel_id) {}
-
  protected:
   virtual ~AudioRenderer() {}
 };