Update {virtual,override,final} for chrome/browser/recovery to follow C++11 style.

chrome/browser/recovery/recovery_install_global_error_factory.h

 // Copyright 2014 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_BROWSER_RECOVERY_RECOVERY_INSTALL_GLOBAL_ERROR_FACTORY_H_
 #define CHROME_BROWSER_RECOVERY_RECOVERY_INSTALL_GLOBAL_ERROR_FACTORY_H_
 
 #include "base/memory/singleton.h"
 #include "components/keyed_service/content/browser_context_keyed_service_factory.h"
 
@@ skipping 10 matching lines @@
   // profile, creating one if none exists.
   static RecoveryInstallGlobalError* GetForProfile(Profile* profile);
 
   // Returns an instance of the RecoveryInstallGlobalErrorFactory singleton.
   static RecoveryInstallGlobalErrorFactory* GetInstance();
 
  private:
   friend struct DefaultSingletonTraits<RecoveryInstallGlobalErrorFactory>;
 
   RecoveryInstallGlobalErrorFactory();
-  virtual ~RecoveryInstallGlobalErrorFactory();
+  ~RecoveryInstallGlobalErrorFactory() override;
 
   // BrowserContextKeyedServiceFactory:
-  virtual KeyedService* BuildServiceInstanceFor(
+  KeyedService* BuildServiceInstanceFor(
       content::BrowserContext* profile) const override;
 
   DISALLOW_COPY_AND_ASSIGN(RecoveryInstallGlobalErrorFactory);
 };
 
 #endif  // CHROME_BROWSER_RECOVERY_RECOVERY_INSTALL_GLOBAL_ERROR_FACTORY_H_