Migrate test block 8 to Dart 2.0.

tests/corelib/from_environment_const_type_test.dart

Index: tests/corelib/from_environment_const_type_test.dart
diff --git a/tests/corelib/from_environment_const_type_test.dart b/tests/corelib/from_environment_const_type_test.dart
deleted file mode 100644
index fb9de9816a13833f353def2185e5f7a73c2d16a1..0000000000000000000000000000000000000000
--- a/tests/corelib/from_environment_const_type_test.dart
+++ /dev/null
@@ -1,43 +0,0 @@
-// Copyright (c) 2014, 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=true -Db=false -Dc=3 -Dd=STRING
-
-import "package:expect/expect.dart";
-
-class Foo {}
-
-const
-    bool //   //# 01: ok
-    int //    //# 02: static type warning, checked mode compile-time error
-    String // //# 03: static type warning, checked mode compile-time error
-    Foo //    //# 04: static type warning, checked mode compile-time error
-    a = const bool.fromEnvironment('a');
-
-const
-    bool //   //# 05: ok
-    int //    //# 06: static type warning, checked mode compile-time error
-    String // //# 07: static type warning, checked mode compile-time error
-    Foo //    //# 08: static type warning, checked mode compile-time error
-    b = const bool.fromEnvironment('b');
-
-const
-    bool //   //# 09: static type warning, checked mode compile-time error
-    int //    //# 10: ok
-    String // //# 11: static type warning, checked mode compile-time error
-    Foo //    //# 12: static type warning, checked mode compile-time error
-    c = const int.fromEnvironment('c');
-
-const
-    bool //   //# 13: static type warning, checked mode compile-time error
-    int //    //# 14: static type warning, checked mode compile-time error
-    String // //# 15: ok
-    Foo //    //# 16: static type warning, checked mode compile-time error
-    d = const String.fromEnvironment('d');
-
-main() {
-  Expect.equals(a, true);
-  Expect.equals(b, false);
-  Expect.equals(c, 3);
-  Expect.equals(d, 'STRING');
-}