Standardize usage of virtual/override/final in ui/

ui/app_list/app_list_model.h

 // Copyright (c) 2012 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_APP_LIST_MODEL_H_
 #define UI_APP_LIST_APP_LIST_MODEL_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 24 matching lines @@
 class APP_LIST_EXPORT AppListModel : public AppListItemListObserver {
  public:
   enum Status {
     STATUS_NORMAL,
     STATUS_SYNCING,  // Syncing apps or installing synced apps.
   };
 
   typedef ui::ListModel<SearchResult> SearchResults;
 
   AppListModel();
-  virtual ~AppListModel();
+  ~AppListModel() override;
 
   void AddObserver(AppListModelObserver* observer);
   void RemoveObserver(AppListModelObserver* observer);
 
   void SetStatus(Status status);
 
   // Finds the item matching |id|.
   AppListItem* FindItem(const std::string& id);
 
   // Find a folder item matching |id|.
@@ skipping 70 matching lines @@
 
   AppListItemList* top_level_item_list() { return top_level_item_list_.get(); }
 
   SearchBoxModel* search_box() { return search_box_.get(); }
   SearchResults* results() { return results_.get(); }
   Status status() const { return status_; }
   bool folders_enabled() const { return folders_enabled_; }
 
  private:
   // AppListItemListObserver
-  virtual void OnListItemMoved(size_t from_index,
-                               size_t to_index,
-                               AppListItem* item) override;
+  void OnListItemMoved(size_t from_index,
+                       size_t to_index,
+                       AppListItem* item) override;
 
   // Returns an existing folder matching |folder_id| or creates a new folder.
   AppListFolderItem* FindOrCreateFolderItem(const std::string& folder_id);
 
   // Adds |item_ptr| to |top_level_item_list_| and notifies observers.
   AppListItem* AddItemToItemListAndNotify(
       scoped_ptr<AppListItem> item_ptr);
 
   // Adds |item_ptr| to |top_level_item_list_| and notifies observers that an
   // Update occured (e.g. item moved from a folder).
@@ skipping 22 matching lines @@
   Status status_;
   ObserverList<AppListModelObserver, true> observers_;
   bool folders_enabled_;
 
   DISALLOW_COPY_AND_ASSIGN(AppListModel);
 };
 
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_APP_LIST_MODEL_H_