Change dart2js' Random to honor the seed.
Change dart2js' Random to honor the seed.

Simulate the same RNG as the VM when a seed is passed.

BUG= http://dartbug.com/15426
R=floitsch@google.com

Committed: https://code.google.com/p/dart/source/detail?r=30893

Review URL: https://codereview.chromium.org//104083003

git-svn-id: c93d8a2297af3b929165606efe145742a534bc71@30894 260f80e4-7a28-3924-810f-c04153c831b5

dartino/dart-sdk,dartino/dart-sdk,dartino/dart-sdk,dart-archive/dart-sdk,dart-archive/dart-sdk,dart-archive/dart-sdk,dart-archive/dart-sdk,dart-lang/sdk,dart-archive/dart-sdk,dart-archive/dart-sdk,dartino/dart-sdk,dart-lang/sdk,dart-archive/dart-sdk,dartino/dart-sdk,dartino/dart-sdk,dartino/dart-sdk,dart-lang/sdk,dart-archive/dart-sdk,dart-archive/dart-sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dartino/dart-sdk,dart-lang/sdk,dartino/dart-sdk