Do not stop a session unless the candidate of a writable connection belongs to the

webrtc/p2p/client/fakeportallocator.h

 /*
  *  Copyright 2010 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 100 matching lines @@
   }
 
   virtual void StopGettingPorts() { running_ = false; }
   virtual bool IsGettingPorts() { return running_; }
   virtual void ClearGettingPorts() {}
 
   int port_config_count() { return port_config_count_; }
 
   void AddPort(cricket::Port* port) {
     port->set_component(component_);
-    port->set_generation(0);
+    port->set_generation(generation());
     port->SignalPortComplete.connect(
         this, &FakePortAllocatorSession::OnPortComplete);
     port->PrepareAddress();
     SignalPortReady(this, port);
   }
   void OnPortComplete(cricket::Port* port) {
     SignalCandidatesReady(this, port->Candidates());
     SignalCandidatesAllocationDone(this);
   }
 
@@ skipping 46 matching lines @@
   rtc::Thread* worker_thread_;
   rtc::PacketSocketFactory* factory_;
   rtc::scoped_ptr<rtc::BasicPacketSocketFactory> owned_factory_;
   ServerAddresses stun_servers_;
   std::vector<RelayServerConfig> turn_servers_;
 };
 
 }  // namespace cricket
 
 #endif  // WEBRTC_P2P_CLIENT_FAKEPORTALLOCATOR_H_