static getMetricComputationInput(data) {
    return {
      trace: data.trace,
      devtoolsLog: data.devtoolsLog,
      gatherContext: data.gatherContext,
      settings: data.settings,
      URL: data.URL,
      SourceMaps: data.SourceMaps,
      simulator: null,
    };
  }
Narrows the metric computation data to the input so child metric requests can be cached.

@param {LH.Artifacts.MetricComputationData} data
@return {LH.Artifacts.MetricComputationDataInput}