Update receive report SSRCs on RemoveSendStream.

talk/media/webrtc/webrtcvideoengine2.cc

 /*
  * libjingle
  * Copyright 2014 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *  1. Redistributions of source code must retain the above copyright notice,
  *     this list of conditions and the following disclaimer.
  *  2. Redistributions in binary form must reproduce the above copyright notice,
@@ skipping 1128 matching lines @@
         send_streams_.find(ssrc);
     if (it == send_streams_.end()) {
       return false;
     }
 
     for (uint32_t old_ssrc : it->second->GetSsrcs())
       send_ssrcs_.erase(old_ssrc);
 
     removed_stream = it->second;
     send_streams_.erase(it);
+
+    // Switch receiver report SSRCs, the one in use is no longer valid.
+    if (rtcp_receiver_report_ssrc_ == ssrc) {
+      rtcp_receiver_report_ssrc_ = send_streams_.empty()
+                                       ? kDefaultRtcpReceiverReportSsrc
+                                       : send_streams_.begin()->first;
+      LOG(LS_INFO) << "SetLocalSsrc on all the receive streams because the "
+                      "previous local SSRC was removed.";
+
+      for (auto& kv : receive_streams_) {
+        kv.second->SetLocalSsrc(rtcp_receiver_report_ssrc_);
+      }
+    }
   }
 
   delete removed_stream;
 
   if (ssrc == default_send_ssrc_) {
     default_send_ssrc_ = 0;
   }
 
   return true;
 }
@@ skipping 1572 matching lines @@
       video_codecs[i].rtx_payload_type = rtx_mapping[video_codecs[i].codec.id];
     }
   }
 
   return video_codecs;
 }
 
 }  // namespace cricket
 
 #endif  // HAVE_WEBRTC_VIDEO