Make cricket::VideoCapturer implement VideoSourceInterface

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 122 matching lines @@
   // The destructor is protected to prevent deletion via the interface.
   // This is so that we allow reference counted classes, where the destructor
   // should never be public, to implement the interface.
   virtual ~VideoRendererInterface() {}
 };
 
 class VideoSourceInterface;
 
 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;
-
+  // Backwards compatibility wrappers
+  virtual void AddRenderer(VideoRendererInterface* renderer) {
+    AddSink(renderer);
+  }
+  virtual void RemoveRenderer(VideoRendererInterface* renderer) {
+    RemoveSink(renderer);
+  }
+  // Register a sink that will receive all frames received on this
+  // track. Requires |sink| != nullptr.
+  virtual void AddSink(rtc::VideoSinkInterface<cricket::VideoFrame>* sink) = 0;
+  // Deregister a sink. Tolerates |sink| == nullptr.
+  virtual void RemoveSink(
+      rtc::VideoSinkInterface<cricket::VideoFrame>* sink) = 0;
   virtual VideoSourceInterface* GetSource() const = 0;
 
  protected:
   virtual ~VideoTrackInterface() {}
 };
 
 // Interface for receiving audio data from a AudioTrack.
 class AudioTrackSinkInterface {
  public:
   virtual void OnData(const void* audio_data,
@@ skipping 109 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_