Decouple DevTools from socket implementation.

net/base/tcp_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.
 
 #ifndef NET_BASE_TCP_LISTEN_SOCKET_H_
 #define NET_BASE_TCP_LISTEN_SOCKET_H_
 #pragma once
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "build/build_config.h"
 #include "net/base/net_export.h"
 #include "net/base/stream_listen_socket.h"
 
 namespace net {
 
 // Implements a TCP socket. Note that this is ref counted.
 class NET_EXPORT TCPListenSocket : public StreamListenSocket {
  public:
   // Listen on port for the specified IP address.  Use 127.0.0.1 to only
   // accept local connections.
   static scoped_refptr<TCPListenSocket> CreateAndListen(
       const std::string& ip, int port, StreamListenSocket::Delegate* del);
 
-  virtual ~TCPListenSocket();
-
  protected:
   TCPListenSocket(SOCKET s, StreamListenSocket::Delegate* del);
 
   static SOCKET CreateAndBind(const std::string& ip, int port);
 
   // Implements StreamListenSocket::Accept.
   virtual void Accept() OVERRIDE;
 
  private:
+  friend class scoped_refptr<TCPListenSocket>;
+  virtual ~TCPListenSocket();
+
   DISALLOW_COPY_AND_ASSIGN(TCPListenSocket);
 };
 
+// Factory that can be used to instantiate TCPListenSocket.
+class TCPListenSocketFactory : public StreamListenSocketFactory {
+ public:
+  TCPListenSocketFactory(const std::string& ip, int port);
+  virtual ~TCPListenSocketFactory();
+
+  // StreamListenSocketFactory overrides.
+  virtual scoped_refptr<StreamListenSocket> CreateAndListen(
+      StreamListenSocket::Delegate* delegate) const OVERRIDE;
+
+ private:
+  const std::string ip_;
+  const int port_;
+
+  DISALLOW_COPY_AND_ASSIGN(TCPListenSocketFactory);
+};
+
 }  // namespace net
 
 #endif  // NET_BASE_TCP_LISTEN_SOCKET_H_