test rename overhaul: step 8 - language tests

tests/language/src/ToplevelCollision2Test.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.
-
-
-get x() => 200;
-
-// Ok: can have a setter named x when getter x is defined.
-set x(var i) { print(i); }
-
-// Error: there is already a getter for x
-int x;                          /// 00: compile-time error
-
-// Error: there is already a getter named x.
-int x(a, b) { print(a + b); }   /// 01: compile-time error
-
-
-
-void main() {
-  // No need to reference x.
-}