Reset the BWE when the network changes

webrtc/media/engine/webrtcvoiceengine.cc

Index: webrtc/media/engine/webrtcvoiceengine.cc
diff --git a/webrtc/media/engine/webrtcvoiceengine.cc b/webrtc/media/engine/webrtcvoiceengine.cc
index fbaab675ec58d6a78b60cf9ac62e7c93955047ca..8b8bff1f37c9bcc96dae8eb5322dbdb495c8343a 100644
--- a/webrtc/media/engine/webrtcvoiceengine.cc
+++ b/webrtc/media/engine/webrtcvoiceengine.cc
@@ -2332,6 +2332,13 @@ void WebRtcVoiceMediaChannel::OnRtcpReceived(
   }
 }
 
+void WebRtcVoiceMediaChannel::OnNetworkRouteChanged(
+    const std::string& transport_name,
+    const NetworkRoute& network_route) {
+  // TODO(honghaiz): uncomment this once the function in call is implemented.
+  // call_->OnNetworkRouteChanged(transport_name, network_route);
+}
+
 bool WebRtcVoiceMediaChannel::MuteStream(uint32_t ssrc, bool muted) {
   RTC_DCHECK(worker_thread_checker_.CalledOnValidThread());
   int channel = GetSendChannelId(ssrc);