remove some new OVERRIDE instances in ui/

ui/app_list/cocoa/apps_grid_controller.mm

Index: ui/app_list/cocoa/apps_grid_controller.mm
diff --git a/ui/app_list/cocoa/apps_grid_controller.mm b/ui/app_list/cocoa/apps_grid_controller.mm
index e018e2cac3c909c68e280af0019b029c9f3d9968..e9cec7a63162b59b73e5a402f39a54305ff45231 100644
--- a/ui/app_list/cocoa/apps_grid_controller.mm
+++ b/ui/app_list/cocoa/apps_grid_controller.mm
@@ -111,7 +111,7 @@ class AppsGridDelegateBridge : public AppListItemListObserver {
     [parent_ listItemMovedFromIndex:from_index
                        toModelIndex:to_index];
   }
-  virtual void OnAppListItemHighlight(size_t index, bool highlight) OVERRIDE {
+  virtual void OnAppListItemHighlight(size_t index, bool highlight) override {
     // NSCollectionView (or -[AppsGridController scrollToPage]) ensures only one
     // item is highlighted, so clearing a highlight isn't necessary.
     if (!highlight)