static getEmptyBlob() {
    return {
      width: NaN,
      height: NaN,
      currentCodecs: '',
      streamBandwidth: NaN,
      decodedFrames: NaN,
      droppedFrames: NaN,
      corruptedFrames: NaN,
      stallsDetected: NaN,
      gapsJumped: NaN,
      estimatedBandwidth: NaN,
      completionPercent: NaN,
      loadLatency: NaN,
      manifestTimeSeconds: NaN,
      drmTimeSeconds: NaN,
      playTime: NaN,
      pauseTime: NaN,
      bufferingTime: NaN,
      licenseTime: NaN,
      liveLatency: NaN,
      maxSegmentDuration: NaN,
      manifestSizeBytes: NaN,
      bytesDownloaded: NaN,
      nonFatalErrorCount: NaN,
      manifestPeriodCount: NaN,
      manifestGapCount: NaN,
      switchHistory: [],
      stateHistory: [],
    };
  }
Create an empty stats blob. This resembles the stats when we are not
playing any content.

@return {shaka.extern.Stats}