Standardize usage of virtual/override/final in extensions/

extensions/browser/api/storage/settings_test_util.h

Index: extensions/browser/api/storage/settings_test_util.h
diff --git a/extensions/browser/api/storage/settings_test_util.h b/extensions/browser/api/storage/settings_test_util.h
index 698792fc5d860c5fd465cd9c6c420f5a36d25a5b..262d1c1dc8cb01912dbe5ad2caff171ea8b06f3f 100644
--- a/extensions/browser/api/storage/settings_test_util.h
+++ b/extensions/browser/api/storage/settings_test_util.h
@@ -60,13 +60,13 @@ scoped_refptr<const Extension> AddExtensionWithIdAndPermissions(
 class MockExtensionSystemWithEventRouter : public MockExtensionSystem {
  public:
   explicit MockExtensionSystemWithEventRouter(content::BrowserContext* context);
-  virtual ~MockExtensionSystemWithEventRouter();
+  ~MockExtensionSystemWithEventRouter() override;
 
   // Factory method for SetTestingFactoryAndUse.
   static KeyedService* Build(content::BrowserContext* context);
 
   // MockExtensionSystem overrides:
-  virtual EventRouter* event_router() override;
+  EventRouter* event_router() override;
 
  private:
   scoped_ptr<EventRouter> event_router_;
@@ -86,15 +86,14 @@ class ScopedSettingsStorageFactory : public SettingsStorageFactory {
   void Reset(const scoped_refptr<SettingsStorageFactory>& delegate);
 
   // SettingsStorageFactory implementation.
-  virtual ValueStore* Create(const base::FilePath& base_path,
-                             const std::string& extension_id) override;
-  virtual void DeleteDatabaseIfExists(
-      const base::FilePath& base_path,
-      const std::string& extension_id) override;
+  ValueStore* Create(const base::FilePath& base_path,
+                     const std::string& extension_id) override;
+  void DeleteDatabaseIfExists(const base::FilePath& base_path,
+                              const std::string& extension_id) override;
 
  private:
   // SettingsStorageFactory is refcounted.
-  virtual ~ScopedSettingsStorageFactory();
+  ~ScopedSettingsStorageFactory() override;
 
   scoped_refptr<SettingsStorageFactory> delegate_;
 };