Implement support for route change notifications in the Transport interface.

remoting/protocol/jingle_session.cc

Index: remoting/protocol/jingle_session.cc
diff --git a/remoting/protocol/jingle_session.cc b/remoting/protocol/jingle_session.cc
index 6f856c0c1d9120205412eb2983df559dad3c1259..a1123bec87d10729606e16738b4790891208c48a 100644
--- a/remoting/protocol/jingle_session.cc
+++ b/remoting/protocol/jingle_session.cc
@@ -525,9 +525,10 @@ void JingleSession::OnRouteChange(cricket::TransportChannel* channel,
     return;
   }
 
-  if (!route_change_callback_.is_null())
+  if (!route_change_callback_.is_null()) {
     route_change_callback_.Run(channel->name(), remote_end_point,
                                local_end_point);
+  }
 }
 
 const cricket::ContentInfo* JingleSession::GetContentInfo() const {