Migrated test block 27 to Dart 2.0.

tests/corelib_strong/string_from_environment_test.dart

Index: tests/corelib_strong/string_from_environment_test.dart
diff --git a/tests/corelib_strong/string_from_environment_test.dart b/tests/corelib_strong/string_from_environment_test.dart
deleted file mode 100644
index 2134e44da1f9a709422a56cd7ae5184c3172878d..0000000000000000000000000000000000000000
--- a/tests/corelib_strong/string_from_environment_test.dart
+++ /dev/null
@@ -1,13 +0,0 @@
-// Copyright (c) 2013, 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.
-// SharedOptions=-Da=a -Db=bb -Dc=ccc -Dd=
-
-import "package:expect/expect.dart";
-
-main() {
-  Expect.equals('a', const String.fromEnvironment('a'));
-  Expect.equals('bb', const String.fromEnvironment('b'));
-  Expect.equals('ccc', const String.fromEnvironment('c'));
-  Expect.equals('', const String.fromEnvironment('d'));
-}