Movable support for VideoReceiveStream::Config and avoid copies

webrtc/video/rtp_stream_receiver.h

Index: webrtc/video/rtp_stream_receiver.h
diff --git a/webrtc/video/rtp_stream_receiver.h b/webrtc/video/rtp_stream_receiver.h
index 4b176f8845c863aa143de886ca9b7fac1ae8eab3..c6062886291bea24f9ef5baf637b82d6a048cf2e 100644
--- a/webrtc/video/rtp_stream_receiver.h
+++ b/webrtc/video/rtp_stream_receiver.h
@@ -60,7 +60,7 @@ class RtpStreamReceiver : public RtpData, public RtpFeedback,
                     PacedSender* paced_sender,
                     PacketRouter* packet_router,
                     VieRemb* remb,
-                    const VideoReceiveStream::Config& config,
+                    const VideoReceiveStream::Config* config,
                     ReceiveStatisticsProxy* receive_stats_proxy,
                     ProcessThread* process_thread);
   ~RtpStreamReceiver();
@@ -128,7 +128,8 @@ class RtpStreamReceiver : public RtpData, public RtpFeedback,
   void EnableReceiveRtpHeaderExtension(const std::string& extension, int id);
 
   Clock* const clock_;
-  const VideoReceiveStream::Config config_;
+  // Ownership of this object lies with VideoReceiveStream, which owns |this|.
+  const VideoReceiveStream::Config& config_;
   vcm::VideoReceiver* const video_receiver_;
   RemoteBitrateEstimator* const remote_bitrate_estimator_;
   PacketRouter* const packet_router_;