Net: Add NET_API to the UDP code.

net/udp/datagram_socket.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_UDP_DATAGRAM_SOCKET_H_
 #define NET_UDP_DATAGRAM_SOCKET_H_
 #pragma once
 
+#include "net/base/net_api.h"
+
 namespace net {
 
 class IPEndPoint;
 
 // A datagram socket is an interface to a protocol which exchanges
 // datagrams, like UDP.
-class DatagramSocket {
+class NET_TEST DatagramSocket {
  public:
   virtual ~DatagramSocket() {}
 
   // Close the socket.
   virtual void Close() = 0;
 
   // Copy the remote udp address into |address| and return a network error code.
   virtual int GetPeerAddress(IPEndPoint* address) const = 0;
 
   // Copy the local udp address into |address| and return a network error code.
   // (similar to getsockname)
   virtual int GetLocalAddress(IPEndPoint* address) const = 0;
 };
 
 }  // namespace net
 
 #endif  // NET_UDP_DATAGRAM_SOCKET_H_