=> {
        const wallHistogramName = `wall_${p.start}_to_${p.end}`;
        const wallHistogramDescription =
            `Wall-clock time ${p.start} to ${p.end} breakdown`;
        const cpuHistogramName = `cpu_${p.start}_to_${p.end}`;
        const cpuHistogramDescription =
            `CPU time ${p.start} to ${p.end} breakdown`;
        const pid = navInfo.rendererHelper.pid;
        const breakdownTree = getWallTimeBreakdownTree(
            navInfo.rendererHelper, navigationStart + p.start,
          