Migrated test block 216 to Dart 2.0.

tests/lib_2/math/random_test.dart

 // Copyright (c) 2013, 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.
 
 // Test that rnd.nextInt with a seed generates the same sequence each time.
 
 // Library tag to allow Dartium to run the test.
 library random_test;
 
 import "package:expect/expect.dart";
@@ skipping 215 matching lines @@
   ];
   for (var i = 0, m = 1; i < 75; i++) {
     Expect.equals(expectations[i], new Random(rawSeed * m).nextInt(65536));
     Expect.equals(
         negative_seed_expectations[i], new Random(rawSeed * -m).nextInt(65536));
     m *= 2;
   }
   // And test zero seed too.
   Expect.equals(21391, new Random(0).nextInt(65536));
 }