Change VideoRtpReceiver to create remote VideoTrack and VideoTrackSource.

webrtc/api/rtpreceiver.h

Index: webrtc/api/rtpreceiver.h
diff --git a/webrtc/api/rtpreceiver.h b/webrtc/api/rtpreceiver.h
index 43adc7294601d0930dcd7c5ad80637056fee7edc..0004e25c69a4f7c7585a2e93c8731c78951e6dcd 100644
--- a/webrtc/api/rtpreceiver.h
+++ b/webrtc/api/rtpreceiver.h
@@ -19,7 +19,9 @@
 
 #include "webrtc/api/mediastreamprovider.h"
 #include "webrtc/api/rtpreceiverinterface.h"
+#include "webrtc/api/videotracksource.h"
 #include "webrtc/base/basictypes.h"
+#include "webrtc/media/base/videobroadcaster.h"
 
 namespace webrtc {
 
@@ -60,12 +62,17 @@ class AudioRtpReceiver : public ObserverInterface,
 
 class VideoRtpReceiver : public rtc::RefCountedObject<RtpReceiverInterface> {
  public:
-  VideoRtpReceiver(VideoTrackInterface* track,
+  VideoRtpReceiver(const std::string& track_id,
+                   rtc::Thread* worker_thread,
                    uint32_t ssrc,
                    VideoProviderInterface* provider);
 
   virtual ~VideoRtpReceiver();
 
+  rtc::scoped_refptr<VideoTrackInterface> video_track() const {
+    return track_.get();
+  }
+
   // RtpReceiverInterface implementation
   rtc::scoped_refptr<MediaStreamTrackInterface> track() const override {
     return track_.get();
@@ -77,9 +84,16 @@ class VideoRtpReceiver : public rtc::RefCountedObject<RtpReceiverInterface> {
 
  private:
   std::string id_;
-  rtc::scoped_refptr<VideoTrackInterface> track_;
   uint32_t ssrc_;
   VideoProviderInterface* provider_;
+  // |broadcaster_| is needed since the decoder can only handle one sink.
+  // It might be better if the decoder can handle multiple sinks and consider
+  // the VideoSinkWants.
+  rtc::VideoBroadcaster broadcaster_;
+  // |source_| is held here to be able to change the state of the source when
+  // the VideoRtpReceiver is stopped.
+  rtc::scoped_refptr<VideoTrackSource> source_;
+  rtc::scoped_refptr<VideoTrackInterface> track_;
 };
 
 }  // namespace webrtc