Migrated test block 171 to Dart 2.0.

tests/lib/async/schedule_microtask2_test.dart

Index: tests/lib/async/schedule_microtask2_test.dart
diff --git a/tests/lib/async/schedule_microtask2_test.dart b/tests/lib/async/schedule_microtask2_test.dart
deleted file mode 100644
index 5620333e81480fa0f18b71d5afcea28a43580aab..0000000000000000000000000000000000000000
--- a/tests/lib/async/schedule_microtask2_test.dart
+++ /dev/null
@@ -1,22 +0,0 @@
-// 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.
-
-library run_async_test;
-
-import 'package:expect/expect.dart';
-import 'dart:async';
-import 'package:unittest/unittest.dart';
-
-main() {
-  // Check that the callbacks are executed in order.
-  test("run async in order test", () {
-    int lastCallback = -1;
-    for (int i = 0; i < 100; i++) {
-      scheduleMicrotask(expectAsync(() {
-        Expect.equals(lastCallback, i - 1);
-        lastCallback = i;
-      }));
-    }
-  });
-}