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

frog/tests/leg_only/operator_equals_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.
-
-class AlwaysTrue {
-  operator ==(a) => true;
-}
-
-class AlwaysFalse {
-  operator ==(b) => false;
-}
-
-main() {
-  var a = new AlwaysTrue();
-  Expect.isTrue(a == 2);
-  Expect.isTrue(a == null);
-  Expect.isFalse(a != 2);
-  Expect.isFalse(a != null);
-
-  a = new AlwaysFalse();
-  Expect.isFalse(a == 2);
-  Expect.isFalse(a == null);
-  Expect.isTrue(a != 2);
-  Expect.isTrue(a != null);
-}