Migrate block 115.

tests/language/getter_setter_interceptor_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.
-
-import "package:expect/expect.dart";
-
-class A {
-  int length = 0;
-}
-
-class B {
-  int length = 0;
-  foo(receiver) {
-    length++;
-    return receiver.length++;
-  }
-
-  bar(receiver) {
-    ++length;
-    return ++receiver.length;
-  }
-}
-
-main() {
-  var a = new A();
-  var b = new B();
-  var c = [1, 2, 3];
-
-  Expect.equals(3, b.foo(c));
-  Expect.equals(5, b.bar(c));
-  Expect.equals(5, c.length);
-
-  Expect.equals(0, b.foo(a));
-  Expect.equals(2, b.bar(a));
-  Expect.equals(2, a.length);
-
-  Expect.equals(4, b.length);
-}