Standardize usage of virtual/override/final in ui/

ui/app_list/cocoa/apps_search_results_model_bridge.h

 // Copyright 2013 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 UI_APP_LIST_COCOA_APPS_SEARCH_RESULTS_MODEL_BRIDGE_H_
 #define UI_APP_LIST_COCOA_APPS_SEARCH_RESULTS_MODEL_BRIDGE_H_
 
 #include "base/mac/scoped_nsobject.h"
 #include "base/memory/scoped_vector.h"
 #include "ui/base/models/list_model_observer.h"
 
 @class NSMenu;
 @class AppsSearchResultsController;
 
 namespace app_list {
 
 // Bridge observing the ListModel representing search results in the app list,
 // and updating the NSTableView where they are displayed.
 class AppsSearchResultsModelBridge : public ui::ListModelObserver {
  public:
   explicit AppsSearchResultsModelBridge(
       AppsSearchResultsController* results_controller);
-  virtual ~AppsSearchResultsModelBridge();
+  ~AppsSearchResultsModelBridge() override;
 
   // Returns the context menu for the item at |index| in the search results
   // model. A menu will be generated if it hasn't been previously requested.
   NSMenu* MenuForItem(size_t index);
 
  private:
   // Lightweight observer to react to icon updates on individual results.
   class ItemObserver;
 
   void UpdateItemObservers();
   void ReloadDataForItems(size_t start, size_t count) const;
 
   // Overridden from ui::ListModelObserver:
-  virtual void ListItemsAdded(size_t start, size_t count) override;
-  virtual void ListItemsRemoved(size_t start, size_t count) override;
-  virtual void ListItemMoved(size_t index, size_t target_index) override;
-  virtual void ListItemsChanged(size_t start, size_t count) override;
+  void ListItemsAdded(size_t start, size_t count) override;
+  void ListItemsRemoved(size_t start, size_t count) override;
+  void ListItemMoved(size_t index, size_t target_index) override;
+  void ListItemsChanged(size_t start, size_t count) override;
 
   AppsSearchResultsController* parent_;  // Weak. Owns us.
   ScopedVector<ItemObserver> item_observers_;
 
   DISALLOW_COPY_AND_ASSIGN(AppsSearchResultsModelBridge);
 };
 
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_COCOA_APPS_SEARCH_RESULTS_MODEL_BRIDGE_H_