pkg/async: updates for unittest deprecations

pkg/async/test/stream_zip_zone_test.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 import "dart:async";
-import "package:async/stream_zip.dart";
 import "package:unittest/unittest.dart";
 
 // Test that stream listener callbacks all happen in the zone where the
 // listen occurred.
 
 main() {
  StreamController controller;
  controller = new StreamController();
  testStream("singlesub-async", controller, controller.stream);
  controller = new StreamController.broadcast();
@@ skipping 10 matching lines @@
  testStream("asbroadcast-sync", controller,
                                 controller.stream.asBroadcastStream());
 }
 
 void testStream(String name, StreamController controller, Stream stream) {
   test(name, () {
     Zone outer = Zone.current;
     runZoned(() {
       Zone newZone1 = Zone.current;
       StreamSubscription sub;
-      sub = stream.listen(expectAsync1((v) {
+      sub = stream.listen(expectAsync((v) {
         expect(v, 42);
         expect(Zone.current, newZone1);
         outer.run(() {
-          sub.onData(expectAsync1((v) {
+          sub.onData(expectAsync((v) {
             expect(v, 37);
             expect(Zone.current, newZone1);
             runZoned(() {
               Zone newZone2 = Zone.current;
-              sub.onData(expectAsync1((v) {
+              sub.onData(expectAsync((v) {
                 expect(v, 87);
                 expect(Zone.current, newZone1);
               }));
             });
             controller.add(87);
           }));
         });
         controller.add(37);
       }));
     });
     controller.add(42);
   });
 }