Wire up audio packet loss to BWE.

webrtc/voice_engine/channel.h

Index: webrtc/voice_engine/channel.h
diff --git a/webrtc/voice_engine/channel.h b/webrtc/voice_engine/channel.h
index 62adc5bdff58dc8db53ad99d4b3d191dcf5133e3..c512c0838458751b16a072745943715e2051e784 100644
--- a/webrtc/voice_engine/channel.h
+++ b/webrtc/voice_engine/channel.h
@@ -304,12 +304,13 @@ class Channel
   void EnableSendTransportSequenceNumber(int id);
   void EnableReceiveTransportSequenceNumber(int id);
 
-    void RegisterSenderCongestionControlObjects(
-        RtpPacketSender* rtp_packet_sender,
-        TransportFeedbackObserver* transport_feedback_observer,
-        PacketRouter* packet_router);
-    void RegisterReceiverCongestionControlObjects(PacketRouter* packet_router);
-    void ResetCongestionControlObjects();
+  void RegisterSenderCongestionControlObjects(
+      RtpPacketSender* rtp_packet_sender,
+      TransportFeedbackObserver* transport_feedback_observer,
+      PacketRouter* packet_router,
+      RtcpBandwidthObserver* bandwidth_observer);
+  void RegisterReceiverCongestionControlObjects(PacketRouter* packet_router);
+  void ResetCongestionControlObjects();
 
   void SetRTCPStatus(bool enable);
   int GetRTCPStatus(bool& enabled);