_renderReportTopbar(report) {
    const el = this._dom.createComponent('topbar');
    const metadataUrl = this._dom.find('a.lh-topbar__url', el);
    metadataUrl.textContent = report.finalDisplayedUrl;
    metadataUrl.title = report.finalDisplayedUrl;
    this._dom.safelySetHref(metadataUrl, report.finalDisplayedUrl);
    return el;
  }
@param {LH.ReportResult} report
@return {DocumentFragment}