function loadTraceFixture(name) {
  const dir = `${LH_ROOT}/core/test/fixtures/artifacts/${name}`;
  return {
    devtoolsLog: JSON.parse(fs.readFileSync(`${dir}/devtoolslog.json`, 'utf-8')),
    trace: JSON.parse(fs.readFileSync(`${dir}/trace.json`, 'utf-8')),
  };
}
@param {string} name
@return {{devtoolsLog: LH.DevtoolsLog, trace: LH.Trace}}