backup for dynamic recent tabs submenu

ui/base/models/simple_menu_model.cc

Index: ui/base/models/simple_menu_model.cc
diff --git a/ui/base/models/simple_menu_model.cc b/ui/base/models/simple_menu_model.cc
index 1ce2d35951ed75ab56f71056934ebbd58958cfc3..b8d084ffd41514f056d10b6234aa1cc872a74239 100644
--- a/ui/base/models/simple_menu_model.cc
+++ b/ui/base/models/simple_menu_model.cc
@@ -238,6 +238,11 @@ void SimpleMenuModel::InsertSubMenuWithStringIdAt(
                   model);
 }
 
+void SimpleMenuModel::RemoveItemAt(int index) {
+  items_.erase(items_.begin() + ValidateItemIndex(index));
+  MenuItemsChanged();
+}
+
 void SimpleMenuModel::SetIcon(int index, const gfx::Image& icon) {
   items_[ValidateItemIndex(index)].icon = icon;
   MenuItemsChanged();