Update smoothed bitrate.

webrtc/voice_engine/channel_proxy.cc

Index: webrtc/voice_engine/channel_proxy.cc
diff --git a/webrtc/voice_engine/channel_proxy.cc b/webrtc/voice_engine/channel_proxy.cc
index 2dd74facb4f550d5ea357ec6ab081d26b20770c8..3112bbfc117fdb9624024200847ed3a973f8bb92 100644
--- a/webrtc/voice_engine/channel_proxy.cc
+++ b/webrtc/voice_engine/channel_proxy.cc
@@ -254,6 +254,11 @@ void ChannelProxy::SetRtcpRttStats(RtcpRttStats* rtcp_rtt_stats) {
   channel()->SetRtcpRttStats(rtcp_rtt_stats);
 }
 
+void ChannelProxy::AdaptCodec() {
+  RTC_DCHECK_RUNS_SERIALIZED(&worker_queue_checker_);
+  channel()->AdaptCodec();
+}
+
 Channel* ChannelProxy::channel() const {
   RTC_DCHECK(channel_owner_.channel());
   return channel_owner_.channel();