Update {virtual,override,final} to follow C++11 style in chrome/browser/chromeos/app_mode.

chrome/browser/chromeos/app_mode/kiosk_diagnosis_runner.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_CHROMEOS_APP_MODE_KIOSK_DIAGNOSIS_RUNNER_H_
 #define CHROME_BROWSER_CHROMEOS_APP_MODE_KIOSK_DIAGNOSIS_RUNNER_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 10 matching lines @@
 class KioskDiagnosisRunner : public KeyedService {
  public:
   // Run diagnostic jobs for |app_id|.
   static void Run(Profile* profile, const std::string& app_id);
 
  private:
   // A BrowserContextKeyedServiceFactory for this service.
   class Factory;
 
   explicit KioskDiagnosisRunner(Profile* profile);
-  virtual ~KioskDiagnosisRunner();
+  ~KioskDiagnosisRunner() override;
 
   void Start(const std::string& app_id);
 
   void StartSystemLogCollection();
   void SendSysLogFeedback(const extensions::SystemInformationList& sys_info);
   void OnFeedbackSent(bool sent);
 
   Profile* profile_;
   std::string app_id_;
   base::WeakPtrFactory<KioskDiagnosisRunner> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(KioskDiagnosisRunner);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_APP_MODE_KIOSK_DIAGNOSIS_RUNNER_H_