Let FlexfecReceiveStreamImpl send RTCP RRs.

webrtc/media/engine/webrtcvideoengine2.cc

 /*
  *  Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 2201 matching lines @@
   // should not be able to create a sender with the same SSRC as a receiver, but
   // right now this can't be done due to unittests depending on receiving what
   // they are sending from the same MediaChannel.
   if (local_ssrc == config_.rtp.remote_ssrc) {
     LOG(LS_INFO) << "Ignoring call to SetLocalSsrc because parameters are "
                     "unchanged; local_ssrc=" << local_ssrc;
     return;
   }
 
   config_.rtp.local_ssrc = local_ssrc;
+  flexfec_config_.local_ssrc = local_ssrc;
   LOG(LS_INFO)
       << "RecreateWebRtcStream (recv) because of SetLocalSsrc; local_ssrc="
       << local_ssrc;
   RecreateWebRtcStream();
 }
 
 void WebRtcVideoChannel2::WebRtcVideoReceiveStream::SetFeedbackParameters(
     bool nack_enabled,
     bool remb_enabled,
     bool transport_cc_enabled,
     webrtc::RtcpMode rtcp_mode) {
   int nack_history_ms = nack_enabled ? kNackHistoryMs : 0;
   if (config_.rtp.nack.rtp_history_ms == nack_history_ms &&
       config_.rtp.remb == remb_enabled &&
       config_.rtp.transport_cc == transport_cc_enabled &&
       config_.rtp.rtcp_mode == rtcp_mode) {
     LOG(LS_INFO)
         << "Ignoring call to SetFeedbackParameters because parameters are "
            "unchanged; nack="
         << nack_enabled << ", remb=" << remb_enabled
         << ", transport_cc=" << transport_cc_enabled;
     return;
   }
   config_.rtp.remb = remb_enabled;
   config_.rtp.nack.rtp_history_ms = nack_history_ms;
   config_.rtp.transport_cc = transport_cc_enabled;
   config_.rtp.rtcp_mode = rtcp_mode;
+  flexfec_config_.rtcp_mode = rtcp_mode;
   LOG(LS_INFO)
       << "RecreateWebRtcStream (recv) because of SetFeedbackParameters; nack="
       << nack_enabled << ", remb=" << remb_enabled
       << ", transport_cc=" << transport_cc_enabled;
   RecreateWebRtcStream();
 }
 
 void WebRtcVideoChannel2::WebRtcVideoReceiveStream::SetRecvParameters(
     const ChangedRecvParameters& params) {
   bool needs_recreation = false;
@@ skipping 249 matching lines @@
         rtx_mapping[video_codecs[i].codec.id] !=
             ulpfec_config.red_payload_type) {
       video_codecs[i].rtx_payload_type = rtx_mapping[video_codecs[i].codec.id];
     }
   }
 
   return video_codecs;
 }
 
 }  // namespace cricket