test rename overhaul: step 8 - language tests

tests/language/src/CompileTimeConstantFTest.dart

-// Copyright (c) 2012, 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.
-
-class A {
-  final x = 4;
-  const A(this.x);
-  const A.named([this.x]);
-  const A.named2([this.x = 2]);
-  const A.named3();
-}
-
-final a1 = const A(0);
-final a2 = const A.named();
-final a3 = const A.named(1);
-final a4 = const A.named2();
-final a5 = const A.named2(3);
-final a6 = const A.named3();
-
-main() {
-  Expect.equals(0, a1.x);
-  Expect.equals(null, a2.x);
-  Expect.equals(1, a3.x);
-  Expect.equals(2, a4.x);
-  Expect.equals(3, a5.x);
-  Expect.equals(4, a6.x);
-}