Prepare the AudioSendStream to be hooked up to send-side BWE.

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 614b7b72fec1c4bde156085710acf0660de294b2..d6cbc8f8fc6c6fc97ec9e4e4ea432b0b90cd8391 100644
--- a/webrtc/voice_engine/channel_proxy.cc
+++ b/webrtc/voice_engine/channel_proxy.cc
@@ -52,6 +52,11 @@ void ChannelProxy::SetSendAudioLevelIndicationStatus(bool enable, int id) {
   RTC_DCHECK_EQ(0, error);
 }
 
+void ChannelProxy::EnableSendTransportSequenceNumber(int id) {
+  RTC_DCHECK(thread_checker_.CalledOnValidThread());
+  channel()->EnableSendTransportSequenceNumber(id);
+}
+
 void ChannelProxy::SetReceiveAbsoluteSenderTimeStatus(bool enable, int id) {
   RTC_DCHECK(thread_checker_.CalledOnValidThread());
   int error = channel()->SetReceiveAbsoluteSenderTimeStatus(enable, id);
@@ -64,6 +69,15 @@ void ChannelProxy::SetReceiveAudioLevelIndicationStatus(bool enable, int id) {
   RTC_DCHECK_EQ(0, error);
 }
 
+void ChannelProxy::SetCongestionControlObjects(
+    RtpPacketSender* rtp_packet_sender,
+    TransportFeedbackObserver* transport_feedback_observer,
+    PacketRouter* packet_router) {
+  RTC_DCHECK(thread_checker_.CalledOnValidThread());
+  channel()->SetCongestionControlObjects(
+      rtp_packet_sender, transport_feedback_observer, packet_router);
+}
+
 CallStatistics ChannelProxy::GetRTCPStatistics() const {
   RTC_DCHECK(thread_checker_.CalledOnValidThread());
   CallStatistics stats = {0};
@@ -112,5 +126,6 @@ Channel* ChannelProxy::channel() const {
   RTC_DCHECK(channel_owner_.channel());
   return channel_owner_.channel();
 }
+
 }  // namespace voe
 }  // namespace webrtc