Propagate media receiver rtcp observers to RtcpTransceiver

Bug: webrtc:8239
Change-Id: I2e287744128ccbc80e011a0b995a68b4310e36ae
Reviewed-on: https://webrtc-review.googlesource.com/33007
Reviewed-by: Niels Moller <nisse@webrtc.org>
Commit-Queue: Danil Chapovalov <danilchap@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#21285}
diff --git a/modules/rtp_rtcp/source/rtcp_transceiver_impl.cc b/modules/rtp_rtcp/source/rtcp_transceiver_impl.cc
index 28d90bc..2ac1c6b 100644
--- a/modules/rtp_rtcp/source/rtcp_transceiver_impl.cc
+++ b/modules/rtp_rtcp/source/rtcp_transceiver_impl.cc
@@ -94,7 +94,7 @@
 
 RtcpTransceiverImpl::~RtcpTransceiverImpl() = default;
 
-void RtcpTransceiverImpl::AddMediaReceiverObserver(
+void RtcpTransceiverImpl::AddMediaReceiverRtcpObserver(
     uint32_t remote_ssrc,
     MediaReceiverRtcpObserver* observer) {
   auto& stored = remote_senders_[remote_ssrc].observers;
@@ -102,7 +102,7 @@
   stored.push_back(observer);
 }
 
-void RtcpTransceiverImpl::RemoveMediaReceiverObserver(
+void RtcpTransceiverImpl::RemoveMediaReceiverRtcpObserver(
     uint32_t remote_ssrc,
     MediaReceiverRtcpObserver* observer) {
   auto remote_sender_it = remote_senders_.find(remote_ssrc);