Add 16-bit network id to the candidate signaling.

webrtc/base/networkmonitor.h

 /*
  *  Copyright 2015 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 28 matching lines @@
   ADAPTER_TYPE_LOOPBACK = 1 << 4
 };
 
 class NetworkBinderInterface {
  public:
   // Binds a socket to the network that is attached to |address| so that all
   // packets on the socket |socket_fd| will be sent via that network.
   // This is needed because some operating systems (like Android) require a
   // special bind call to put packets on a non-default network interface.
   virtual int BindSocketToNetwork(int socket_fd, const IPAddress& address) = 0;
+  virtual ~NetworkBinderInterface() {}
 };
 
 /*
  * Receives network-change events via |OnNetworksChanged| and signals the
  * networks changed event.
  *
  * Threading consideration:
  * It is expected that all upstream operations (from native to Java) are
  * performed from the worker thread. This includes creating, starting and
  * stopping the monitor. This avoids the potential race condition when creating
@@ skipping 59 matching lines @@
 
   virtual ~NetworkMonitorFactory();
 
  protected:
   NetworkMonitorFactory();
 };
 
 }  // namespace rtc
 
 #endif  // WEBRTC_BASE_NETWORKMONITOR_H_