Migrated test block 170 to Dart 2.0.

tests/lib_2/lib_2_flutter.status

Index: tests/lib_2/lib_2_flutter.status
diff --git a/tests/lib_2/lib_2_flutter.status b/tests/lib_2/lib_2_flutter.status
new file mode 100644
index 0000000000000000000000000000000000000000..b28ce239f203d6e80cac7bda63e1375913e3b4e5
--- /dev/null
+++ b/tests/lib_2/lib_2_flutter.status
@@ -0,0 +1,8 @@
+# Copyright (c) 2017, 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.
+
+[ $runtime == flutter ]
+async/intercept_schedule_microtask2_test: Skip # Flutter Issue 9113
+async/intercept_schedule_microtask6_test: Skip # Flutter Issue 9113
+async/intercept_schedule_microtask5_test: Skip # Flutter Issue 9113