Update {virtual,override,final} to follow C++11 style.

chrome/browser/android/logo_service.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_ANDROID_LOGO_SERVICE_H_
 #define CHROME_BROWSER_ANDROID_LOGO_SERVICE_H_
 
 #include "base/memory/singleton.h"
 #include "components/keyed_service/content/browser_context_keyed_service_factory.h"
 #include "components/keyed_service/core/keyed_service.h"
 #include "components/search_provider_logos/logo_tracker.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 
 class Profile;
 
 // Provides the logo for a profile's default search provider.
 //
 // Example usage:
 //   LogoService* logo_service = LogoServiceFactory::GetForProfile(profile);
 //   logo_service->GetLogo(...);
 //
 class LogoService : public KeyedService {
  public:
   explicit LogoService(Profile* profile);
-  virtual ~LogoService();
+  ~LogoService() override;
 
   // Gets the logo for the default search provider and notifies |observer|
   // with the results.
   void GetLogo(search_provider_logos::LogoObserver* observer);
 
  private:
   Profile* profile_;
   scoped_ptr<search_provider_logos::LogoTracker> logo_tracker_;
 
   DISALLOW_COPY_AND_ASSIGN(LogoService);
 };
 
 // Singleton that owns all LogoServices and associates them with Profiles.
 class LogoServiceFactory : public BrowserContextKeyedServiceFactory {
  public:
   static LogoService* GetForProfile(Profile* profile);
 
   static LogoServiceFactory* GetInstance();
 
  private:
   friend struct DefaultSingletonTraits<LogoServiceFactory>;
 
   LogoServiceFactory();
-  virtual ~LogoServiceFactory();
+  ~LogoServiceFactory() override;
 
   // BrowserContextKeyedServiceFactory:
-  virtual KeyedService* BuildServiceInstanceFor(
+  KeyedService* BuildServiceInstanceFor(
       content::BrowserContext* context) const override;
 };
 
 #endif  // CHROME_BROWSER_ANDROID_LOGO_SERVICE_H_