Migrated test block 27 to Dart 2.0.

tests/corelib/string_from_environment3_test.dart

Index: tests/corelib/string_from_environment3_test.dart
diff --git a/tests/corelib/string_from_environment3_test.dart b/tests/corelib/string_from_environment3_test.dart
deleted file mode 100644
index 962f5f1de0507713e1218d2b5e531bc9cf06d3e1..0000000000000000000000000000000000000000
--- a/tests/corelib/string_from_environment3_test.dart
+++ /dev/null
@@ -1,11 +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.
-
-main() {
-  const String.fromEnvironment('NOT_FOUND', defaultValue: 1); // //# 01: compile-time error
-  const String.fromEnvironment('NOT_FOUND', defaultValue: true); // //# 02: compile-time error
-  const String.fromEnvironment(null); // //# 03: compile-time error
-  const String.fromEnvironment(1); // //# 04: compile-time error
-  const String.fromEnvironment([]); // //# 05: compile-time error
-}