net: move udp directory into socket

net/udp/datagram_client_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_CLIENT_SOCKET_H_
-#define NET_UDP_DATAGRAM_CLIENT_SOCKET_H_
-
-#include "net/base/net_export.h"
-#include "net/base/network_change_notifier.h"
-#include "net/socket/socket.h"
-#include "net/udp/datagram_socket.h"
-
-namespace net {
-
-class IPEndPoint;
-
-class NET_EXPORT_PRIVATE DatagramClientSocket : public DatagramSocket,
-                                                public Socket {
- public:
-  ~DatagramClientSocket() override {}
-
-  // Initialize this socket as a client socket to server at |address|.
-  // Returns a network error code.
-  virtual int Connect(const IPEndPoint& address) = 0;
-
-  // Binds this socket to |network| and initializes socket as a client socket
-  // to server at |address|. All data traffic on the socket will be sent and
-  // received via |network|. This call will fail if |network| has disconnected.
-  // Communication using this socket will fail if |network| disconnects.
-  // Returns a net error code.
-  virtual int ConnectUsingNetwork(NetworkChangeNotifier::NetworkHandle network,
-                                  const IPEndPoint& address) = 0;
-
-  // Same as ConnectUsingNetwork, except that the current default network is
-  // used. Returns a net error code.
-  virtual int ConnectUsingDefaultNetwork(const IPEndPoint& address) = 0;
-
-  // Returns the network that either ConnectUsingNetwork() or
-  // ConnectUsingDefaultNetwork() bound this socket to. Returns
-  // NetworkChangeNotifier::kInvalidNetworkHandle if not explicitly bound via
-  // ConnectUsingNetwork() or ConnectUsingDefaultNetwork().
-  virtual NetworkChangeNotifier::NetworkHandle GetBoundNetwork() const = 0;
-
-};
-
-}  // namespace net
-
-#endif  // NET_UDP_DATAGRAM_CLIENT_SOCKET_H_