Method closeShadowRootAsync_

src/multidoc-manager.js:541–545

* @param {!ShadowRoot} shadowRoot * @private

(shadowRoot)

   * @private
   */
  closeShadowRootAsync_(shadowRoot) {
    this.timer_.delay(() => {
      this.closeShadowRoot_(shadowRoot);
    }, 0);
  }

  /** @private */
  purgeShadowRoots_() {