  navigationStart + p.end);
        const cpuBreakdownTree = getCpuTimeBreakdownTree(
            navInfo.rendererHelper, navigationStart + p.start,
            navigationStart + p.end);
        const diagnostics = {
          'Navigation infos': new tr.v.d.GenericSet([{
            url: navInfo.url,
            pid: navInfo.rendererHelper.pid,
            navStart: navigationStart,
            frameIdRef: navInfo.navigationStart.args.frame
          }]),
          'breakdown': tr.metrics.sh.createBreakdown