When doing continual gathering, remove local candidates when a network is dropped.

webrtc/p2p/base/portinterface.h

 /*
  *  Copyright 2012 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 86 matching lines @@
   virtual void SendBindingResponse(StunMessage* request,
                                    const rtc::SocketAddress& addr) = 0;
   virtual void SendBindingErrorResponse(
       StunMessage* request, const rtc::SocketAddress& addr,
       int error_code, const std::string& reason) = 0;
 
   // Signaled when this port decides to delete itself because it no longer has
   // any usefulness.
   sigslot::signal1<PortInterface*> SignalDestroyed;
 
+  // Signaled when the network used by this port becomes inactive.
+  sigslot::signal1<PortInterface*> SignalNetworkInactive;
+
   // Signaled when Port discovers ice role conflict with the peer.
   sigslot::signal1<PortInterface*> SignalRoleConflict;
 
   // Normally, packets arrive through a connection (or they result signaling of
   // unknown address).  Calling this method turns off delivery of packets
   // through their respective connection and instead delivers every packet
   // through this port.
   virtual void EnablePortPackets() = 0;
   sigslot::signal4<PortInterface*, const char*, size_t,
                    const rtc::SocketAddress&> SignalReadPacket;
 
   // Emitted each time a packet is sent on this port.
   sigslot::signal1<const rtc::SentPacket&> SignalSentPacket;
 
   virtual std::string ToString() const = 0;
 
  protected:
   PortInterface() {}
 };
 
 }  // namespace cricket
 
 #endif  // WEBRTC_P2P_BASE_PORTINTERFACE_H_