Move responsibility for RTP header extensions on video receive.

webrtc/video_receive_stream.h

Index: webrtc/video_receive_stream.h
diff --git a/webrtc/video_receive_stream.h b/webrtc/video_receive_stream.h
index b3a98c617ac2ebc120bf50f557faf537af47ba52..d1eca003fa484cb07584fb9a0f280c7806b093bb 100644
--- a/webrtc/video_receive_stream.h
+++ b/webrtc/video_receive_stream.h
@@ -162,9 +162,6 @@ class VideoReceiveStream {
       // Map from video payload type (apt) -> RTX payload type (pt).
       // For RTX to be enabled, both an SSRC and this mapping are needed.
       std::map<int, int> rtx_payload_types;
-
-      // RTP header extensions used for the received stream.
-      std::vector<RtpExtension> extensions;
     } rtp;
 
     // Transport for outgoing packets (RTCP).