Second patch in making destructors of refcounted objects private.

net/base/listen_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.
 
 // TCP/IP server that handles IO asynchronously in the specified MessageLoop.
 // These objects are NOT thread safe.  They use WSAEVENT handles to monitor
 // activity in a given MessageLoop.  This means that callbacks will
 // happen in that loop's thread always and that all other methods (including
 // constructors and destructors) should also be called from the same thread.
 
@@ skipping 41 matching lines @@
     // to the delegate with this call.
     virtual void DidAccept(ListenSocket *server, ListenSocket *connection) = 0;
     virtual void DidRead(ListenSocket *connection, const std::string& data) = 0;
     virtual void DidClose(ListenSocket *sock) = 0;
   };
 
   // Listen on port for the specified IP address.  Use 127.0.0.1 to only
   // accept local connections.
   static ListenSocket* Listen(std::string ip, int port,
                               ListenSocketDelegate* del);
-  virtual ~ListenSocket();
 
   // 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);
 
   // NOTE: This is for unit test use only!
   // Pause/Resume calling Read().  Note that ResumeReads() will also call
   // Read() if there is anything to read.
   void PauseReads();
   void ResumeReads();
 
  protected:
+  friend class base::RefCountedThreadSafe<ListenSocket>;
+
   static const SOCKET kInvalidSocket;
   static const int kSocketError;
 
   ListenSocket(SOCKET s, ListenSocketDelegate* del);
+  virtual ~ListenSocket();
   static SOCKET Listen(std::string ip, int port);
   // if valid, returned SOCKET is non-blocking
   static SOCKET Accept(SOCKET s);
 
   virtual void SendInternal(const char* bytes, int len);
 
   virtual void Listen();
   virtual void Accept();
   virtual void Read();
   virtual void Close();
@@ skipping 28 matching lines @@
   ListenSocketDelegate *socket_delegate_;
 
  private:
   bool reads_paused_;
   bool has_pending_reads_;
 
   DISALLOW_COPY_AND_ASSIGN(ListenSocket);
 };
 
 #endif  // NET_BASE_LISTEN_SOCKET_H_