Rename RtpRtcp::Configuration::media_send_ssrc to local_media_ssrc

The name media_send_ssrc makes less sense when used mostly for the
RtcpReceiver functionality.

The old member is still there and used as a fallback. That will be
cleaned away after downstream code is fixed.

Bug: webrtc:10774
Change-Id: I4ec18db76910f31dfe76bc9b137ffe89220d3fa8
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/149836
Reviewed-by: Sebastian Jansson <srte@webrtc.org>
Reviewed-by: Fredrik Solenberg <solenberg@webrtc.org>
Commit-Queue: Erik Språng <sprang@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#28923}
diff --git a/modules/rtp_rtcp/source/rtcp_sender_unittest.cc b/modules/rtp_rtcp/source/rtcp_sender_unittest.cc
index 09cdff1..a077836 100644
--- a/modules/rtp_rtcp/source/rtcp_sender_unittest.cc
+++ b/modules/rtp_rtcp/source/rtcp_sender_unittest.cc
@@ -92,7 +92,7 @@
     configuration.retransmission_rate_limiter = &retransmission_rate_limiter_;
     configuration.rtcp_report_interval_ms = 1000;
     configuration.receive_statistics = receive_statistics_.get();
-    configuration.media_send_ssrc = kSenderSsrc;
+    configuration.local_media_ssrc = kSenderSsrc;
     return configuration;
   }
 
@@ -195,7 +195,7 @@
   config.receive_statistics = receive_statistics_.get();
   config.outgoing_transport = &test_transport_;
   config.rtcp_report_interval_ms = 1000;
-  config.media_send_ssrc = kSenderSsrc;
+  config.local_media_ssrc = kSenderSsrc;
   rtcp_sender_.reset(new RTCPSender(config));
   rtcp_sender_->SetRemoteSSRC(kRemoteSsrc);
   rtcp_sender_->SetRTCPStatus(RtcpMode::kReducedSize);
@@ -217,7 +217,7 @@
   config.receive_statistics = receive_statistics_.get();
   config.outgoing_transport = &test_transport_;
   config.rtcp_report_interval_ms = 1000;
-  config.media_send_ssrc = kSenderSsrc;
+  config.local_media_ssrc = kSenderSsrc;
   rtcp_sender_.reset(new RTCPSender(config));
   rtcp_sender_->SetRemoteSSRC(kRemoteSsrc);
   rtcp_sender_->SetRTCPStatus(RtcpMode::kCompound);
@@ -695,7 +695,7 @@
   config.receive_statistics = receive_statistics_.get();
   config.outgoing_transport = &mock_transport;
   config.rtcp_report_interval_ms = 1000;
-  config.media_send_ssrc = kSenderSsrc;
+  config.local_media_ssrc = kSenderSsrc;
   rtcp_sender_.reset(new RTCPSender(config));
 
   rtcp_sender_->SetRemoteSSRC(kRemoteSsrc);
@@ -827,7 +827,7 @@
 TEST_F(RtcpSenderTest, DoesntSchedulesInitialReportOnFirstSetSsrc) {
   // Set up without first SSRC not set at construction.
   RtpRtcp::Configuration configuration = GetDefaultConfig();
-  configuration.media_send_ssrc = absl::nullopt;
+  configuration.local_media_ssrc = absl::nullopt;
 
   rtcp_sender_.reset(new RTCPSender(configuration));
   rtcp_sender_->SetRemoteSSRC(kRemoteSsrc);