Method buildCallback

test/integration/test-video-manager.js:487–491

@override

()

    /** @override */
    buildCallback() {
      const ampdoc = Services.ampdocServiceFor(this.win).getSingleDoc();
      installVideoManagerForDoc(ampdoc);
      Services.videoManagerForDoc(this.win.document).register(this);
    }

    /** @override */
    layoutCallback() {