Method poll

src/service/timer-impl.js:154–163

* Returns a promise that resolves after `predicate` returns true. * Polls with interval `delay` * @param {number} delay * @param {function():boolean} predicate * @return {!Promise}

(delay, predicate)

   * @return {!Promise}
   */
  poll(delay, predicate) {
    return new this.win.Promise((resolve) => {
      const interval = this.win.setInterval(() => {
        if (predicate()) {
          this.win.clearInterval(interval);
          resolve();
        }
      }, delay);
    });
  }
}

/**