Make Port (and subclasses) fully "Network"-based, instead of IP-based.

webrtc/p2p/client/basicportallocator.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 347 matching lines @@
                     const char* data,
                     size_t size,
                     const rtc::SocketAddress& remote_addr,
                     const rtc::PacketTime& packet_time);
 
   void OnPortDestroyed(PortInterface* port);
 
   BasicPortAllocatorSession* session_;
   bool network_failed_ = false;
   rtc::Network* network_;
-  rtc::IPAddress ip_;
+  // Compared with the new best IP in DisableEquivalentPhases.
+  rtc::IPAddress previous_best_ip_;
   PortConfiguration* config_;
   State state_;
   uint32_t flags_;
   ProtocolList protocols_;
   std::unique_ptr<rtc::AsyncPacketSocket> udp_socket_;
   // There will be only one udp port per AllocationSequence.
   UDPPort* udp_port_;
   std::vector<TurnPort*> turn_ports_;
   int phase_;
 };
 
 }  // namespace cricket
 
 #endif  // WEBRTC_P2P_CLIENT_BASICPORTALLOCATOR_H_