makeDatalistInput_(container, name, setup, onChange, values) {
    container.addRow(/* labelString= */ null, /* tooltipString= */ null);
    const input =
        new shakaDemo.DatalistInput(container, name, onChange, values);
    input.extra().textContent = name;
    setup(input.input(), input.container());
  }
A utility to simplify the creation of datalist input on the dialog.
@param {!shakaDemo.InputContainer} container
@param {string} name
@param {function(!HTMLInputElement, !Element)} setup
@param {function(!Element, !shakaDemo.Input)} onChange
@param {!Array<string>} values
@private