Delete FrameInput method and FrameInputWrapper class.

talk/app/webrtc/mediastreaminterface.h

 /*
  * libjingle
  * Copyright 2012 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *  1. Redistributions of source code must retain the above copyright notice,
  *     this list of conditions and the following disclaimer.
  *  2. Redistributions in binary form must reproduce the above copyright notice,
@@ skipping 129 matching lines @@
 
 class VideoTrackInterface : public MediaStreamTrackInterface {
  public:
   // Register a renderer that will render all frames received on this track.
   virtual void AddRenderer(VideoRendererInterface* renderer) = 0;
   // Deregister a renderer.
   virtual void RemoveRenderer(VideoRendererInterface* renderer) = 0;
 
   virtual VideoSourceInterface* GetSource() const = 0;
 
+  // Return the track input sink. I.e., frames sent to this sink are
+  // propagated to all renderers registered with the track. The
+  // returned sink must not change between calls. Currently, this
+  // method is used for remote tracks (VideoRtpReceiver); further
+  // refactoring is planned for this path, it's unclear if this method
+  // belongs here long term.
+
+  // We do this instead of simply implementing the
+  // VideoSourceInterface directly, because if we did the latter, we'd
+  // need an OnFrame method in VideoTrackProxy, with a thread jump on
+  // each call.
+
+  // TODO(nisse): It has a default implementation so that mock
+  // objects, in particular, chrome's MockWebRtcVideoTrack, doesn't
+  // need to know about it. Consider removing the implementation (or
+  // this comment) after refactoring dust settles.
+  virtual rtc::VideoSinkInterface<cricket::VideoFrame>* GetSink() {
+    return nullptr;
+  };
+
  protected:
   virtual ~VideoTrackInterface() {}
 };
 
 // Interface for receiving audio data from a AudioTrack.
 class AudioTrackSinkInterface {
  public:
   virtual void OnData(const void* audio_data,
                       int bits_per_sample,
                       int sample_rate,
@@ skipping 107 matching lines @@
   virtual bool RemoveTrack(AudioTrackInterface* track) = 0;
   virtual bool RemoveTrack(VideoTrackInterface* track) = 0;
 
  protected:
   virtual ~MediaStreamInterface() {}
 };
 
 }  // namespace webrtc
 
 #endif  // TALK_APP_WEBRTC_MEDIASTREAMINTERFACE_H_