Function getNavigationTiming

ads/google/a4a/utils.js:111–118

* Returns the value of some navigation timing parameter. * Feature detection is used for safety on browsers that do not support the * performance API. * @param {!Window} win * @param {string} timingEvent The name of the timing event, e.g. * 'navigationStart' or 'domContentLoadEventStart'.

(win, timingEvent)

 * @return {number}
 */
function getNavigationTiming(win, timingEvent) {
  return (
    (win['performance'] &&
      win['performance']['timing'] &&
      win['performance']['timing'][timingEvent]) ||
    0
  );
}

/**
 * Check whether Google Ads supports the A4A rendering pathway is valid for the