Update the type and cost of existing networks if its type is found later by network monitor

webrtc/p2p/base/p2ptransportchannel.cc

Index: webrtc/p2p/base/p2ptransportchannel.cc
diff --git a/webrtc/p2p/base/p2ptransportchannel.cc b/webrtc/p2p/base/p2ptransportchannel.cc
index 206113c4ebcc554d9b401e716c5031412eda4845..4733bea0c996bff49dd01194123b59f98164f49b 100644
--- a/webrtc/p2p/base/p2ptransportchannel.cc
+++ b/webrtc/p2p/base/p2ptransportchannel.cc
@@ -507,6 +507,8 @@ void P2PTransportChannel::OnPortReady(PortAllocatorSession *session,
   port->SignalDestroyed.connect(this, &P2PTransportChannel::OnPortDestroyed);
   port->SignalNetworkInactive.connect(
       this, &P2PTransportChannel::OnPortNetworkInactive);
+  port->SignalNetworkCostChanged.connect(
+      this, &P2PTransportChannel::OnPortNetworkCostChanged);
   port->SignalRoleConflict.connect(
       this, &P2PTransportChannel::OnRoleConflict);
   port->SignalSentPacket.connect(this, &P2PTransportChannel::OnSentPacket);
@@ -1497,6 +1499,12 @@ void P2PTransportChannel::OnPortNetworkInactive(PortInterface* port) {
   SignalCandidatesRemoved(this, candidates);
 }
 
+void P2PTransportChannel::OnPortNetworkCostChanged(PortInterface* port) {
+  // Network cost of a port will affect the connection comparison.
+  // So request sorting if the network cost of any port has changed.
+  RequestSort();
+}
+
 // We data is available, let listeners know
 void P2PTransportChannel::OnReadPacket(Connection* connection,
                                        const char* data,