Migrated test block 19 to Dart 2.0.

tests/corelib/reg_exp_first_match_test.dart

Index: tests/corelib/reg_exp_first_match_test.dart
diff --git a/tests/corelib/reg_exp_first_match_test.dart b/tests/corelib/reg_exp_first_match_test.dart
deleted file mode 100644
index 40e38fa109ccd9184765c8b2dfadf39c202023a6..0000000000000000000000000000000000000000
--- a/tests/corelib/reg_exp_first_match_test.dart
+++ /dev/null
@@ -1,18 +0,0 @@
-// 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.
-
-import "package:expect/expect.dart";
-
-// Dart test program for RegExp.firstMatch.
-
-class RegExpFirstMatchTest {
-  static testMain() {
-    Expect.equals('cat', new RegExp("(\\w+)").firstMatch("cat dog")[0]);
-    Expect.equals(null, new RegExp("foo").firstMatch("bar"));
-  }
-}
-
-main() {
-  RegExpFirstMatchTest.testMain();
-}