Make it possible to keep the port allocator session running

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 45 matching lines @@
                                            std::string(),
                                            false));
       AddPort(port_.get());
     }
     ++port_config_count_;
     running_ = true;
   }
 
   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->SignalPortComplete.connect(
         this, &FakePortAllocatorSession::OnPortComplete);
     port->PrepareAddress();
     SignalPortReady(this, port);
   }
@@ skipping 34 matching lines @@
 
  private:
   rtc::Thread* worker_thread_;
   rtc::PacketSocketFactory* factory_;
   rtc::scoped_ptr<rtc::BasicPacketSocketFactory> owned_factory_;
 };
 
 }  // namespace cricket
 
 #endif  // WEBRTC_P2P_CLIENT_FAKEPORTALLOCATOR_H_