Reland of Use RtxReceiveStream.

webrtc/video/video_receive_stream.h

Index: webrtc/video/video_receive_stream.h
diff --git a/webrtc/video/video_receive_stream.h b/webrtc/video/video_receive_stream.h
index 32ce81232669b9d448372d93e761a937d0907fcb..8b680aeb1eda8789fc6456d403f612dff9cbd7de 100644
--- a/webrtc/video/video_receive_stream.h
+++ b/webrtc/video/video_receive_stream.h
@@ -38,6 +38,7 @@ class ProcessThread;
 class RTPFragmentationHeader;
 class RtpStreamReceiverInterface;
 class RtpStreamReceiverControllerInterface;
+class RtxReceiveStream;
 class VCMTiming;
 class VCMJitterEstimator;
 
@@ -125,6 +126,10 @@ class VideoReceiveStream : public webrtc::VideoReceiveStream,
 
   CallStats* const call_stats_;
 
+  // Shared by media and rtx stream receivers, since the latter has no RtpRtcp
+  // module of its own.
+  const std::unique_ptr<ReceiveStatistics> rtp_receive_statistics_;
+
   std::unique_ptr<VCMTiming> timing_;  // Jitter buffer experiment.
   vcm::VideoReceiver video_receiver_;
   std::unique_ptr<rtc::VideoSinkInterface<VideoFrame>> incoming_video_stream_;
@@ -141,6 +146,7 @@ class VideoReceiveStream : public webrtc::VideoReceiveStream,
   std::unique_ptr<video_coding::FrameBuffer> frame_buffer_;
 
   std::unique_ptr<RtpStreamReceiverInterface> media_receiver_;
+  std::unique_ptr<RtxReceiveStream> rtx_receive_stream_;
   std::unique_ptr<RtpStreamReceiverInterface> rtx_receiver_;
 
   // Whenever we are in an undecodable state (stream has just started or due to