Update the BWE when the network route changes.

webrtc/call/call.cc

Index: webrtc/call/call.cc
diff --git a/webrtc/call/call.cc b/webrtc/call/call.cc
index e3c6ec7a0ccb5443e69dabb02dcb11f39f2460e0..67237a97039ea0e13fab791d9dbf0b51eb8057eb 100644
--- a/webrtc/call/call.cc
+++ b/webrtc/call/call.cc
@@ -626,9 +626,13 @@ void Call::OnNetworkRouteChanged(const std::string& transport_name,
     kv->second = network_route;
     LOG(LS_INFO) << "Network route changed on transport " << transport_name
                  << ": new local network id " << network_route.local_network_id
-                 << " new remote network id "
-                 << network_route.remote_network_id;
-    // TODO(holmer): Update the BWE bitrates.
+                 << " new remote network id " << network_route.remote_network_id
+                 << " Reset bitrate to "
+                 << config_.bitrate_config.start_bitrate_bps << "bps";
+    congestion_controller_->ResetBweBitrates(
+        config_.bitrate_config.start_bitrate_bps,
+        config_.bitrate_config.min_bitrate_bps,
+        config_.bitrate_config.max_bitrate_bps);
   }
 }