Use a single views::MenuConfig instance for each platform

ui/views/controls/menu/menu_item_view.h

Index: ui/views/controls/menu/menu_item_view.h
diff --git a/ui/views/controls/menu/menu_item_view.h b/ui/views/controls/menu/menu_item_view.h
index 8348320d17e5b9544df485af6e1a950088192bd5..b6a9010b9b9425ec7bd5ec6119be16850d312165 100644
--- a/ui/views/controls/menu/menu_item_view.h
+++ b/ui/views/controls/menu/menu_item_view.h
@@ -324,9 +324,6 @@ class VIEWS_EXPORT MenuItemView : public View {
     use_right_margin_ = use_right_margin;
   }
 
-  // Returns a reference to MenuConfig to be used with this menu.
-  const MenuConfig& GetMenuConfig() const;
-
  protected:
   // Creates a MenuItemView. This is used by the various AddXXX methods.
   MenuItemView(MenuItemView* parent, int command, Type type);