Migrated test block 20 to Dart 2.0.

tests/corelib/regexp/issue_19193_test.dart

Index: tests/corelib/regexp/issue_19193_test.dart
diff --git a/tests/corelib/regexp/issue_19193_test.dart b/tests/corelib/regexp/issue_19193_test.dart
deleted file mode 100644
index 52746cf5b67482b8921d03a3f4213c812b5df2a5..0000000000000000000000000000000000000000
--- a/tests/corelib/regexp/issue_19193_test.dart
+++ /dev/null
@@ -1,12 +0,0 @@
-// Copyright (c) 2015, 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:expect/expect.dart';
-
-// Regression test for http://dartbug.com/19193
-main() {
-  RegExp re = new RegExp(r'.*(a+)+\d');
-  Expect.isTrue("a0aaaaaaaaaaaaa".contains(re));
-  Expect.isTrue("a0aaaaaaaaaaaaaa".contains(re)); // false when using JSCRE.
-}