Remove candidates when doing continual gathering

webrtc/p2p/base/port.h

 /*
  *  Copyright 2004 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 339 matching lines @@
   void Construct();
   // Called when one of our connections deletes itself.
   void OnConnectionDestroyed(Connection* conn);
 
   // Whether this port is dead, and hence, should be destroyed on the controlled
   // side.
   bool dead() const {
     return ice_role_ == ICEROLE_CONTROLLED && connections_.empty();
   }
 
+  void OnNetworkDown(const rtc::Network* network);
+
   rtc::Thread* thread_;
   rtc::PacketSocketFactory* factory_;
   std::string type_;
   bool send_retransmit_count_attribute_;
   rtc::Network* network_;
   rtc::IPAddress ip_;
   uint16_t min_port_;
   uint16_t max_port_;
   std::string content_name_;
   int component_;
@@ skipping 283 matching lines @@
            const rtc::PacketOptions& options) override;
   int GetError() override { return error_; }
 
  private:
   int error_ = 0;
 };
 
 }  // namespace cricket
 
 #endif  // WEBRTC_P2P_BASE_PORT_H_