Fix the Mac OS directory watcher tests on the bots.

R=rnystrom@google.com
BUG=15024

Review URL: https://codereview.chromium.org//58903015

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart/pkg/watcher@30328 260f80e4-7a28-3924-810f-c04153c831b5
1 file changed
tree: 692878dde439e30197716b74777b1d34eb1e364c
  1. pkgs/