Migrated test block 19 to Dart 2.0.

tests/corelib_2/reg_exp1_test.dart

 // Copyright (c) 2011, 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.
 // Dart test for testing regular expressions in Dart.
 
 import "package:expect/expect.dart";
 
 class RegExp1Test {
   static testMain() {
     RegExp exp1 = new RegExp("bar|foo");
@@ skipping 11 matching lines @@
     Expect.equals(false, exp2.hasMatch("bar"));
     Expect.equals("o+", exp2.pattern);
     Expect.equals(false, exp2.isCaseSensitive);
     Expect.equals(false, exp2.isMultiLine);
   }
 }
 
 main() {
   RegExp1Test.testMain();
 }