Move frog/tests/{leg,leg_only,frog_native} to tests/compiler/.

frog/tests/leg_only/compile_time_constant4_test.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.
-
-final x = "foo";
-final y = "foo";
-final g1 = x
-  + "bar"  // TODO(lrn) - see below: 01: compile-time error
-;
-final g2 = x
-  + null   /// 02: compile-time error
-;
-final g3 = x
-  + 499   /// 03: compile-time error
-;
-final g4 = x
-  + 3.3   /// 04: compile-time error
-;
-final g5 = x
-  + true   /// 05: compile-time error
-;
-final g6 = x
-  + false   /// 06: compile-time error
-;
-final g7 = "foo"
-  + x[0]   /// 07: compile-time error
-;
-final g8 = 1
-  + x.length  /// 08: compile-time error
-;
-final g9 = x == y;
-
-use(x) => x;
-
-main() {
-  Expect.equals("foobar", g1);
-  Expect.isTrue(g9);
-  use(g1);  // TODO(lrn): Should fail when String.operator+ is removed.
-  use(g2);
-  use(g3);
-  use(g4);
-  use(g5);
-  use(g6);
-  use(g7);
-  use(g8);
-}