Second patch in making destructors of refcounted objects private.

net/proxy/proxy_config_service_linux.h

 // Copyright (c) 2009 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_PROXY_PROXY_CONFIG_SERVICE_LINUX_H_
 #define NET_PROXY_PROXY_CONFIG_SERVICE_LINUX_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 121 matching lines @@
     // Called from IO thread.
     int GetProxyConfig(ProxyConfig* config);
 
     // Posts a call to OnDestroy() to the UI thread. Called from
     // ProxyConfigServiceLinux's destructor.
     void PostDestroyTask();
     // Safely stops gconf notifications. Posted to the UI thread.
     void OnDestroy();
 
    private:
+    friend class base::RefCountedThreadSafe<Delegate>;
+
+    ~Delegate() {}
+
     // Obtains an environment variable's value. Parses a proxy server
     // specification from it and puts it in result. Returns true if the
     // requested variable is defined and the value valid.
     bool GetProxyFromEnvVarForScheme(const char* variable,
                                      ProxyServer::Scheme scheme,
                                      ProxyServer* result_server);
     // As above but with scheme set to HTTP, for convenience.
     bool GetProxyFromEnvVar(const char* variable, ProxyServer* result_server);
     // Fills proxy config from environment variables. Returns true if
     // variables were found and the configuration is valid.
@@ skipping 74 matching lines @@
 
  private:
   scoped_refptr<Delegate> delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(ProxyConfigServiceLinux);
 };
 
 }  // namespace net
 
 #endif  // NET_PROXY_PROXY_CONFIG_SERVICE_LINUX_H_