Show connection type in web-app.

remoting/protocol/connection_to_host.h

Index: remoting/protocol/connection_to_host.h
diff --git a/remoting/protocol/connection_to_host.h b/remoting/protocol/connection_to_host.h
index aadfa7bd1fe22482075d2c795f069c1e9fe92c34..dad8ba85cfe78287a116071f29fe5bdb462dbff5 100644
--- a/remoting/protocol/connection_to_host.h
+++ b/remoting/protocol/connection_to_host.h
@@ -78,6 +78,10 @@ class ConnectionToHost : public SignalStrategy::Listener,
     // delayed. This is used to indicate in the UI when connection is
     // temporarily broken.
     virtual void OnConnectionReady(bool ready) = 0;
+
+    // Called when the route type (direct vs. STUN vs. proxied) changes.
+    virtual void OnRouteChanged(const std::string& channel_name,
+                                const protocol::TransportRoute& route) = 0;
   };
 
   ConnectionToHost(bool allow_nat_traversal);