Migrated test block 15 to Dart 2.0.

tests/corelib_2/list_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.
 
 import "dart:collection";
 import "dart:typed_data";
 import "package:expect/expect.dart";
 
 void main() {
   // Typed lists - fixed length and can only contain integers.
@@ skipping 613 matching lines @@
   });
   // Not negative.
   Expect.throws(() {
     new List.filled(-2, 42);
   });
   // Not null.
   Expect.throws(() {
     new List.filled(null, 42);
   });
 }