Reset the BWE when the network changes

webrtc/p2p/base/port.cc

Index: webrtc/p2p/base/port.cc
diff --git a/webrtc/p2p/base/port.cc b/webrtc/p2p/base/port.cc
index 9207c9d04260433736e51b409f54ab6059c682ed..cd982c5f07d9ac3cbb13bb46e43d0c6fbcb95843 100644
--- a/webrtc/p2p/base/port.cc
+++ b/webrtc/p2p/base/port.cc
@@ -257,6 +257,7 @@ void Port::AddAddress(const rtc::SocketAddress& address,
   c.set_network_name(network_->name());
   c.set_network_type(network_->type());
   c.set_network_cost(network_cost_);
+  c.set_network_id(network_->id());
   c.set_generation(generation_);
   c.set_related_address(related_address);
   c.set_foundation(
@@ -1413,6 +1414,7 @@ void Connection::MaybeAddPrflxCandidate(ConnectionRequest* request,
   new_local_candidate.set_network_name(local_candidate().network_name());
   new_local_candidate.set_network_type(local_candidate().network_type());
   new_local_candidate.set_network_cost(local_candidate().network_cost());
+  new_local_candidate.set_network_id(local_candidate().network_id());
   new_local_candidate.set_related_address(local_candidate().address());
   new_local_candidate.set_foundation(ComputeFoundation(
       PRFLX_PORT_TYPE, local_candidate().protocol(),