Unify newapi::RtcpMode and RTCPMethod.

webrtc/video/video_send_stream.cc

Index: webrtc/video/video_send_stream.cc
diff --git a/webrtc/video/video_send_stream.cc b/webrtc/video/video_send_stream.cc
index 670344854d749da95f83add41fffc9b582e6a176..91acc7629aefaa347fc5e255856657e77614540e 100644
--- a/webrtc/video/video_send_stream.cc
+++ b/webrtc/video/video_send_stream.cc
@@ -442,10 +442,10 @@ void VideoSendStream::SignalNetworkState(NetworkState state) {
   // When it goes down, disable RTCP afterwards. This ensures that any packets
   // sent due to the network state changed will not be dropped.
   if (state == kNetworkUp)
-    vie_channel_->SetRTCPMode(kRtcpCompound);
+    vie_channel_->SetRTCPMode(RtcpMode::COMPOUND);
   vie_encoder_->SetNetworkTransmissionState(state == kNetworkUp);
   if (state == kNetworkDown)
-    vie_channel_->SetRTCPMode(kRtcpOff);
+    vie_channel_->SetRTCPMode(RtcpMode::OFF);
 }
 
 int64_t VideoSendStream::GetRtt() const {