Migrated test block 17 to Dart 2.0.

tests/corelib_2/queue_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.
 
 library queue.test;
 
 import "package:expect/expect.dart";
 import 'dart:collection';
 
 abstract class QueueTest {
@@ skipping 468 matching lines @@
   Expect.equals(null, prev.previousEntry());
 
   Expect.equals(87, prev.remove());
 }
 
 main() {
   new DoubleLinkedQueueTest().testMain();
   new ListQueueTest().testMain();
   linkEntryTest();
 }