replace OVERRIDE and FINAL with override and final in ash/

ash/shell/window_watcher_shelf_item_delegate.h

Index: ash/shell/window_watcher_shelf_item_delegate.h
diff --git a/ash/shell/window_watcher_shelf_item_delegate.h b/ash/shell/window_watcher_shelf_item_delegate.h
index 44542f6b156e83cf2ab2b60717ee747d33dc4d56..1da99d70549cd440a811be36bd19a9096e93aa84 100644
--- a/ash/shell/window_watcher_shelf_item_delegate.h
+++ b/ash/shell/window_watcher_shelf_item_delegate.h
@@ -22,13 +22,13 @@ class WindowWatcherShelfItemDelegate : public ShelfItemDelegate {
   virtual ~WindowWatcherShelfItemDelegate();
 
   // ShelfItemDelegate:
-  virtual bool ItemSelected(const ui::Event& event) OVERRIDE;
-  virtual base::string16 GetTitle() OVERRIDE;
-  virtual ui::MenuModel* CreateContextMenu(aura::Window* root_window) OVERRIDE;
-  virtual ShelfMenuModel* CreateApplicationMenu(int event_flags) OVERRIDE;
-  virtual bool IsDraggable() OVERRIDE;
-  virtual bool ShouldShowTooltip() OVERRIDE;
-  virtual void Close() OVERRIDE;
+  virtual bool ItemSelected(const ui::Event& event) override;
+  virtual base::string16 GetTitle() override;
+  virtual ui::MenuModel* CreateContextMenu(aura::Window* root_window) override;
+  virtual ShelfMenuModel* CreateApplicationMenu(int event_flags) override;
+  virtual bool IsDraggable() override;
+  virtual bool ShouldShowTooltip() override;
+  virtual void Close() override;
 
  private:
   ShelfID id_;