test rename overhaul: step 8 - language tests

tests/language/top_level_method_test.dart

 // Copyright (c) 2011, 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.
 
 untypedTopLevel() {
   return 1;
 }
 
 class TopLevelMethodTest {
   static void testMain() {
     Expect.equals(1, untypedTopLevel());
   }
 }
 
 main() {
   TopLevelMethodTest.testMain();
 }