Revert "Clean up naming scheme for reflection names."

tests/lib/mirrors/optional_parameters_test.dart

-// Copyright (c) 2015, 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.
-
-// Regression test for http://dartbug.com/22987.
-// Ensure that functions whose signature only differs in optionality of
-// parameters are reflected correctly.
-
-library optional_parameter_test;
-
-@MirrorsUsed(targets: 'optional_parameter_test')
-import "dart:mirrors";
-import 'package:expect/expect.dart';
-
-class A {
-  foo(int x) => x;
-}
-
-class B {
-  foo([int x]) => x+1;
-}
-
-main () {
-  var x = {};
-  x["A"] = reflect(new A());
-  x["B"] = reflect(new B());
-
-  Expect.equals(1, x["A"].invoke(#foo, [1]).reflectee);
-  Expect.equals(2, x["B"].invoke(#foo, [1]).reflectee);
-}