Adapt Random class to be able to run in javascript integer compatibility mode.

tests/lib/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 a coin toss with Random.nextBool() is fair.
 
 // Library tag to allow Dartium to run the test.
 library random_test;
 
 import "package:expect/expect.dart";
@@ skipping 29 matching lines @@
   Expect.equals(   7976427, rnd.nextInt(1 << ++i));
   Expect.equals(  31792146, rnd.nextInt(1 << ++i));
   Expect.equals(  35563210, rnd.nextInt(1 << ++i));
   Expect.equals( 113261265, rnd.nextInt(1 << ++i));
   Expect.equals( 205117298, rnd.nextInt(1 << ++i));
   Expect.equals( 447729735, rnd.nextInt(1 << ++i));
   Expect.equals(1072507596, rnd.nextInt(1 << ++i));
   Expect.equals(2134030067, rnd.nextInt(1 << ++i));
   Expect.equals(721180690, rnd.nextInt(1 << ++i));
   Expect.equals(32, i);
-  // If max is too large expect an ArgumentError. 
+  // If max is too large expect an ArgumentError.
   Expect.throws(() => rnd.nextInt((1 << i)+1), (e) => e is ArgumentError);
+
+  rnd = new Random(6790);
+  Expect.approxEquals(0.7360144236, rnd.nextDouble());
+  Expect.approxEquals(0.3292339731, rnd.nextDouble());
+  Expect.approxEquals(0.3489622548, rnd.nextDouble());
+  Expect.approxEquals(0.9815975892, rnd.nextDouble());
 }