Add DefaultListenSocket.

net/base/listen_socket.h

-// Copyright (c) 2012 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.
-
-// Abstract socket server that handles IO asynchronously in the specified
-// MessageLoop.
-
-#ifndef NET_BASE_LISTEN_SOCKET_H_
-#define NET_BASE_LISTEN_SOCKET_H_
-#pragma once
-
-#include <string>
-
-#include "base/basictypes.h"
-#include "base/memory/ref_counted.h"
-#include "build/build_config.h"
-#include "net/base/net_export.h"
-
-namespace net {
-
-// Defines a socket interface for a server.
-class NET_EXPORT ListenSocket
-    : public base::RefCountedThreadSafe<ListenSocket> {
- public:
-  // TODO(erikkay): this delegate should really be split into two parts
-  // to split up the listener from the connected socket.  Perhaps this class
-  // should be split up similarly.
-  class ListenSocketDelegate {
-   public:
-    // server is the original listening Socket, connection is the new
-    // Socket that was created.  Ownership of connection is transferred
-    // to the delegate with this call.
-    virtual void DidAccept(ListenSocket *server,
-                           ListenSocket *connection) = 0;
-    virtual void DidRead(ListenSocket *connection,
-                         const char* data,
-                         int len) = 0;
-    virtual void DidClose(ListenSocket *sock) = 0;
-
-   protected:
-    virtual ~ListenSocketDelegate() {}
-  };
-
-  // Send data to the socket.
-  void Send(const char* bytes, int len, bool append_linefeed = false);
-  void Send(const std::string& str, bool append_linefeed = false);
-
- protected:
-  ListenSocket(ListenSocketDelegate* del);
-  virtual ~ListenSocket();
-
-  virtual void SendInternal(const char* bytes, int len) = 0;
-
-  ListenSocketDelegate* const socket_delegate_;
-
- private:
-  friend class base::RefCountedThreadSafe<ListenSocket>;
-
-  DISALLOW_COPY_AND_ASSIGN(ListenSocket);
-};
-
-}  // namespace net
-
-#endif  // NET_BASE_LISTEN_SOCKET_H_