Change Future.delayed to take a Duration.

Review URL: https://codereview.chromium.org//12224081

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@18471 260f80e4-7a28-3924-810f-c04153c831b5
1 file changed
tree: 61881242341cae640747a6904f3a773b215e4480
  1. lib/
  2. test/
  3. pubspec.yaml