Standardize usage of virtual/override/final in chrome/browser/ui/

chrome/browser/ui/app_list/start_page_service.h

Index: chrome/browser/ui/app_list/start_page_service.h
diff --git a/chrome/browser/ui/app_list/start_page_service.h b/chrome/browser/ui/app_list/start_page_service.h
index 4a2abb9ecc2f5b0f2183fbe39323827a4de7693c..e2a7c824d9227d7159c96b1178eb35a32544c4b5 100644
--- a/chrome/browser/ui/app_list/start_page_service.h
+++ b/chrome/browser/ui/app_list/start_page_service.h
@@ -75,13 +75,13 @@ class StartPageService : public KeyedService {
   class StartPageWebContentsDelegate;
 
   explicit StartPageService(Profile* profile);
-  virtual ~StartPageService();
+  ~StartPageService() override;
 
   void LoadContents();
   void UnloadContents();
 
   // KeyedService overrides:
-  virtual void Shutdown() override;
+  void Shutdown() override;
 
   Profile* profile_;
   scoped_ptr<content::WebContents> contents_;