Reset the BWE when the network changes

webrtc/call.h

Index: webrtc/call.h
diff --git a/webrtc/call.h b/webrtc/call.h
index 3ba473fec07d09e5293a836218bba926ba8dcc1b..2abcc0d8bf21ef379e218e188a611b624cbaaf9f 100644
--- a/webrtc/call.h
+++ b/webrtc/call.h
@@ -17,6 +17,7 @@
 #include "webrtc/audio_receive_stream.h"
 #include "webrtc/audio_send_stream.h"
 #include "webrtc/audio_state.h"
+#include "webrtc/base/networkroute.h"
 #include "webrtc/base/socket.h"
 #include "webrtc/video_receive_stream.h"
 #include "webrtc/video_send_stream.h"
@@ -140,6 +141,10 @@ class Call {
   virtual void SignalChannelNetworkState(MediaType media,
                                          NetworkState state) = 0;
 
+  virtual void OnNetworkRouteChanged(
+      const std::string& transport_name,
+      const cricket::NetworkRoute& network_route) = 0;
+
   virtual void OnSentPacket(const rtc::SentPacket& sent_packet) = 0;
 
   virtual ~Call() {}