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

webrtc/p2p/base/transportcontroller.cc

 /*
  *  Copyright 2015 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 456 matching lines @@
   // enough population.
   if (redetermine_role_on_ice_restart_ && transport->local_description() &&
       IceCredentialsChanged(transport->local_description()->ice_ufrag,
                             transport->local_description()->ice_pwd,
                             tdesc.ice_ufrag, tdesc.ice_pwd)) {
     IceRole new_ice_role =
         (action == CA_OFFER) ? ICEROLE_CONTROLLING : ICEROLE_CONTROLLED;
     SetIceRole(new_ice_role);
   }
 
+  LOG(LS_VERBOSE) << "Set local transport description on " << transport_name
+                  << " with ufrag " << tdesc.ice_ufrag
+                  << " pwd " << tdesc.ice_pwd;
   return transport->SetLocalTransportDescription(tdesc, action, err);
 }
 
 bool TransportController::SetRemoteTransportDescription_n(
     const std::string& transport_name,
     const TransportDescription& tdesc,
     ContentAction action,
     std::string* err) {
   RTC_DCHECK(network_thread_->IsCurrent());
 
   Transport* transport = GetTransport_n(transport_name);
   if (!transport) {
     // If we didn't find a transport, that's not an error;
     // it could have been deleted as a result of bundling.
     // TODO(deadbeef): Make callers smarter so they won't attempt to set a
     // description on a deleted transport.
     return true;
   }
 

[Taylor Brandstetter, 2016/09/14 20:40:27]

nit: If we log setting the local transport description, we may want to log the
remote as well for symmetry. Someone may be confused when looking at the log and
seeing one but not the other.

[honghaiz3, 2016/09/15 17:38:29]

Done.

   return transport->SetRemoteTransportDescription(tdesc, action, err);
 }
 
 void TransportController::MaybeStartGathering_n() {
   for (const auto& kv : transports_) {
     kv.second->MaybeStartGathering();
   }
 }
 
 bool TransportController::AddRemoteCandidates_n(
@@ skipping 190 matching lines @@
         RTC_FROM_HERE, this, MSG_ICEGATHERINGSTATE,
         new rtc::TypedMessageData<IceGatheringState>(new_gathering_state));
   }
 }
 
 void TransportController::OnDtlsHandshakeError(rtc::SSLHandshakeError error) {
   SignalDtlsHandshakeError(error);
 }
 
 }  // namespace cricket