Migrated test block 168 to Dart 2.0.

tests/lib_2/async/dart2js_uncaught_error_test.dart

Index: tests/lib_2/async/dart2js_uncaught_error_test.dart
diff --git a/tests/lib/async/dart2js_uncaught_error_test.dart b/tests/lib_2/async/dart2js_uncaught_error_test.dart
similarity index 94%
rename from tests/lib/async/dart2js_uncaught_error_test.dart
rename to tests/lib_2/async/dart2js_uncaught_error_test.dart
index 8f1c203666ae43934f324687c12400822a8c7e74..136c91edf119ac8502a4dde87ccf4d0d5679a7b4 100644
--- a/tests/lib/async/dart2js_uncaught_error_test.dart
+++ b/tests/lib_2/async/dart2js_uncaught_error_test.dart
@@ -2,6 +2,8 @@
 // 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.
 
+// TODO(bkonyi): This test should be moved to compiler/dart2js.
+
 import "dart:async";
 import "dart:js";
 import "dart:collection" show Queue;