Move socket related files from net/base to net/socket.

net/base/socket.h

-// Copyright (c) 2006-2008 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_BASE_SOCKET_H_
-#define NET_BASE_SOCKET_H_
-
-#include "net/base/completion_callback.h"
-
-namespace net {
-
-class IOBuffer;
-
-// Represents a read/write socket.
-class Socket {
- public:
-  virtual ~Socket() {}
-
-  // Reads data, up to buf_len bytes, from the socket.  The number of bytes
-  // read is returned, or an error is returned upon failure.  Zero is returned
-  // to indicate end-of-file.  ERR_IO_PENDING is returned if the operation
-  // could not be completed synchronously, in which case the result will be
-  // passed to the callback when available. If the operation is not completed
-  // immediately, the socket acquires a reference to the provided buffer until
-  // the callback is invoked or the socket is destroyed.
-  virtual int Read(IOBuffer* buf, int buf_len,
-                   CompletionCallback* callback) = 0;
-
-  // Writes data, up to buf_len bytes, to the socket.  Note: only part of the
-  // data may be written!  The number of bytes written is returned, or an error
-  // is returned upon failure.  ERR_IO_PENDING is returned if the operation
-  // could not be completed synchronously, in which case the result will be
-  // passed to the callback when available. If the operation is not completed
-  // immediately, the socket acquires a reference to the provided buffer until
-  // the callback is invoked or the socket is destroyed.
-  // Implementations of this method should not modify the contents of the actual
-  // buffer that is written to the socket.
-  virtual int Write(IOBuffer* buf, int buf_len,
-                    CompletionCallback* callback) = 0;
-};
-
-}  // namespace net
-
-#endif  // NET_BASE_SOCKET_H_