addCustomSelectInput_(name, values, onChange, tooltipMessage) {
    this.createRow_(name, tooltipMessage);
    // The input is not provided a name, as (in this enclosed space) it makes
    // the actual field unreadable.
    this.latestInput_ = new shakaDemo.SelectInput(
        this.getLatestSection_(), null, onChange, values);
    return this;
  }
@param {string} name
@param {!Object<string, string>} values
@param {function(!HTMLInputElement)} onChange
@param {string=} tooltipMessage
@return {!shakaDemo.Config}
@private