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

frog/tests/leg_only/closure5_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 A {
-  foo() => 499;
-  bar([a = 1, b = 7, c = 99]) => a + b + c;
-  toto() => bar;
-  gee(f) => f(toto);
-}
-
-main() {
-  var a = new A();
-  var foo = a.foo;
-  Expect.equals(499, foo());
-  var bar = a.bar;
-  Expect.equals(107, bar());
-  Expect.equals(3, bar(1, 1, 1));
-  Expect.equals(10, bar(c: 2));
-  var toto = a.toto;
-  var gee = a.gee;
-  Expect.equals(-10, gee((f) => f()(-1, -2, c: -7)));
-}