Makes bookmark menu lazily create menus and removes limits

ui/views/controls/menu/menu_controller.cc

Index: ui/views/controls/menu/menu_controller.cc
diff --git a/ui/views/controls/menu/menu_controller.cc b/ui/views/controls/menu/menu_controller.cc
index 7e77b13d8e98c6177845b279771c9bcbab7f49c5..7cc495535baafdaf99caadd1ca7e1728b240dfc4 100644
--- a/ui/views/controls/menu/menu_controller.cc
+++ b/ui/views/controls/menu/menu_controller.cc
@@ -1515,6 +1515,7 @@ void MenuController::OpenMenuImpl(MenuItemView* item, bool show) {
     item->GetDelegate()->WillShowMenu(item);
     if (old_count != item->GetSubmenu()->child_count()) {
       // If the number of children changed then we may need to add empty items.
+      item->RemoveEmptyMenus();
       item->AddEmptyMenus();
     }
   }