RefCounted types should not have public destructors, chrome/browser/ part 5

chrome/browser/printing/cloud_print/cloud_print_proxy_service.cc

 // 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.
 
 #include "chrome/browser/printing/cloud_print/cloud_print_proxy_service.h"
 
 #include <stack>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 19 matching lines @@
 
 using content::BrowserThread;
 
 class CloudPrintProxyService::TokenExpiredNotificationDelegate
     : public NotificationDelegate {
  public:
   explicit TokenExpiredNotificationDelegate(
       CloudPrintProxyService* cloud_print_service)
           : cloud_print_service_(cloud_print_service) {
   }
+
   void Display() {}
+
   void Error() {
     cloud_print_service_->OnTokenExpiredNotificationError();
   }
+
   void Close(bool by_user) {
     cloud_print_service_->OnTokenExpiredNotificationClosed(by_user);
   }
+
   void Click() {
     cloud_print_service_->OnTokenExpiredNotificationClick();
   }
+
   std::string id() const { return "cloudprint.tokenexpired"; }
 
  private:
+  virtual ~TokenExpiredNotificationDelegate() {}
+
   CloudPrintProxyService* cloud_print_service_;
   DISALLOW_COPY_AND_ASSIGN(TokenExpiredNotificationDelegate);
 };
 
 CloudPrintProxyService::CloudPrintProxyService(Profile* profile)
     : profile_(profile),
       token_expired_delegate_(NULL),
       ALLOW_THIS_IN_INITIALIZER_LIST(weak_factory_(this)),
       enforcing_connector_policy_(false) {
 }
@@ skipping 193 matching lines @@
 }
 
 bool CloudPrintProxyService::InvokeServiceTask(const base::Closure& task) {
   GetServiceProcessControl()->Launch(task, base::Closure());
   return true;
 }
 
 ServiceProcessControl* CloudPrintProxyService::GetServiceProcessControl() {
   return ServiceProcessControl::GetInstance();
 }