Migrated test block 171 to Dart 2.0.

tests/lib/async/run_zoned5_test.dart

Index: tests/lib/async/run_zoned5_test.dart
diff --git a/tests/lib/async/run_zoned5_test.dart b/tests/lib/async/run_zoned5_test.dart
deleted file mode 100644
index 7a7da9e9cce3dfc053916c19ba4453cd804126bd..0000000000000000000000000000000000000000
--- a/tests/lib/async/run_zoned5_test.dart
+++ /dev/null
@@ -1,18 +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.
-
-import 'package:async_helper/async_helper.dart';
-import "package:expect/expect.dart";
-import 'dart:async';
-
-main() {
-  asyncStart();
-  // Ensure that `runZoned`'s onError handles synchronous errors.
-  runZoned(() {
-    throw 0;
-  }, onError: (e) {
-    Expect.equals(0, e);
-    asyncEnd();
-  });
-}