RefCounted types should not have public destructors, chrome/ remaining parts

chrome/service/cloud_print/cloud_print_auth.h

 // Copyright (c) 2011 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 CHROME_SERVICE_CLOUD_PRINT_CLOUD_PRINT_AUTH_H_
 #define CHROME_SERVICE_CLOUD_PRINT_CLOUD_PRINT_AUTH_H_
 #pragma once
 
 #include <string>
 
@@ skipping 23 matching lines @@
     virtual void OnInvalidCredentials() = 0;
    protected:
      virtual ~Client() {}
   };
 
   CloudPrintAuth(Client* client,
                  const GURL& cloud_print_server_url,
                  const base::DictionaryValue* print_sys_settings,
                  const gaia::OAuthClientInfo& oauth_client_info,
                  const std::string& proxy_id);
-  virtual ~CloudPrintAuth();
 
   // Note:
   //
   // The Authenticate* methods are the various entry points from
   // CloudPrintProxyBackend::Core. It calls us on a dedicated thread to
   // actually perform synchronous (and potentially blocking) operations.
   //
   // When we are passed in an LSID we authenticate using that
   // and retrieve new auth tokens.
   void AuthenticateWithLsid(const std::string& lsid,
@@ skipping 21 matching lines @@
   // CloudPrintURLFetcher::Delegate implementation.
   virtual CloudPrintURLFetcher::ResponseAction HandleJSONData(
       const content::URLFetcher* source,
       const GURL& url,
       base::DictionaryValue* json_data,
       bool succeeded) OVERRIDE;
   virtual CloudPrintURLFetcher::ResponseAction OnRequestAuthError() OVERRIDE;
   virtual std::string GetAuthHeader() OVERRIDE;
 
  private:
+  friend class base::RefCountedThreadSafe<CloudPrintAuth>;
+  virtual ~CloudPrintAuth();
+
   Client* client_;
   gaia::OAuthClientInfo oauth_client_info_;
   scoped_ptr<gaia::GaiaOAuthClient> oauth_client_;
   scoped_ptr<DictionaryValue> print_system_settings_;
 
   // The CloudPrintURLFetcher instance for the current request.
   scoped_refptr<CloudPrintURLFetcher> request_;
 
   GURL cloud_print_server_url_;
   // Proxy id, need to send to the cloud print server to find and update
   // necessary printers during the migration process.
   const std::string& proxy_id_;
   // The OAuth2 refresh token for the robot.
   std::string refresh_token_;
   // The email address of the user. This is only used during initial
   // authentication with an LSID. This is only used for storing in prefs for
   // display purposes.
   std::string user_email_;
   // The email address of the robot account.
   std::string robot_email_;
   // client login token used to authenticate request to cloud print server to
   // get the robot account.
   std::string client_login_token_;
 
   DISALLOW_COPY_AND_ASSIGN(CloudPrintAuth);
 };
 
 #endif  // CHROME_SERVICE_CLOUD_PRINT_CLOUD_PRINT_AUTH_H_