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

chrome/service/cloud_print/cloud_print_connector.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_CONNECTOR_H_
 #define CHROME_SERVICE_CLOUD_PRINT_CLOUD_PRINT_CONNECTOR_H_
 #pragma once
 
 #include <list>
 #include <map>
@@ skipping 21 matching lines @@
    public:
     virtual void OnAuthFailed() = 0;
    protected:
      virtual ~Client() {}
   };
 
   CloudPrintConnector(Client* client,
                       const std::string& proxy_id,
                       const GURL& cloud_print_server_url,
                       const DictionaryValue* print_system_settings);
-  virtual ~CloudPrintConnector();
 
   bool Start();
   void Stop();
   bool IsRunning();
 
   // Register printer from the list.
   void RegisterPrinters(const printing::PrinterList& printers);
 
   // Check for jobs for specific printer. If printer id is empty
   // jobs will be checked for all available printers.
@@ skipping 13 matching lines @@
 
   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<CloudPrintConnector>;
+  virtual ~CloudPrintConnector();
+
   // Prototype for a response handler.
   typedef CloudPrintURLFetcher::ResponseAction
       (CloudPrintConnector::*ResponseHandler)(
           const content::URLFetcher* source,
           const GURL& url,
           DictionaryValue* json_data,
           bool succeeded);
 
   // Begin response handlers
   CloudPrintURLFetcher::ResponseAction HandlePrinterListResponse(
@@ skipping 93 matching lines @@
   // The CloudPrintURLFetcher instance for the current request.
   scoped_refptr<CloudPrintURLFetcher> request_;
   // The CloudPrintURLFetcher instance for the user message request.
   scoped_refptr<CloudPrintURLFetcher> user_message_request_;
 
   DISALLOW_COPY_AND_ASSIGN(CloudPrintConnector);
 };
 
 #endif  // CHROME_SERVICE_CLOUD_PRINT_CLOUD_PRINT_CONNECTOR_H_