Function resolver

packages/zone.js/test/extra/bluebird.spec.ts:427–431

(cb: Function)

  it('bluebird promise fromCallback method should be in zone', (done) => {
    const resolver = (cb: Function) => {
      setTimeout(() => {
        cb(null, 'test');
      }, 10);
    };

    zone.run(() => {
      BluebirdPromise.fromCallback(resolver).then((r: string) => {