Handle platform access through prefix in dart2dart

tests/language/regress_21998_lib3.dart

Index: tests/language/regress_21998_lib3.dart
diff --git a/samples-dev/swarm/swarm.dart b/tests/language/regress_21998_lib3.dart
similarity index 50%
copy from samples-dev/swarm/swarm.dart
copy to tests/language/regress_21998_lib3.dart
index d44bd2be8419fc03e53fae74b6c538c3fee638d8..a18f2ff32529a505e7c7f76ed1b9acbb7b21eb34 100644
--- a/samples-dev/swarm/swarm.dart
+++ b/tests/language/regress_21998_lib3.dart
@@ -1,11 +1,9 @@
-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
+// 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.
 
-library swarm;
+library regress_21998_lib3;
 
-import 'swarmlib.dart';
+import 'dart:math' as math;
 
-void main() {
-  new Swarm().run();
-}
+lib3_max(a, b) => math.max(a, b);