Adding logs to track potential cause of not starting port allocation.

webrtc/p2p/base/transportcontroller.cc

Index: webrtc/p2p/base/transportcontroller.cc
diff --git a/webrtc/p2p/base/transportcontroller.cc b/webrtc/p2p/base/transportcontroller.cc
index de98df23bc51c17319f398288576eaa86e5b6131..bd6ee66871e503771b461a8ce673d319f2176ff9 100644
--- a/webrtc/p2p/base/transportcontroller.cc
+++ b/webrtc/p2p/base/transportcontroller.cc
@@ -474,6 +474,7 @@ bool TransportController::SetLocalTransportDescription_n(
     SetIceRole(new_ice_role);
   }
 
+  LOG(LS_INFO) << "Set local transport description on " << transport_name;
   return transport->SetLocalTransportDescription(tdesc, action, err);
 }
 
@@ -493,6 +494,7 @@ bool TransportController::SetRemoteTransportDescription_n(
     return true;
   }
 
+  LOG(LS_INFO) << "Set remote transport description on " << transport_name;
   return transport->SetRemoteTransportDescription(tdesc, action, err);
 }