Fix the watcher tests on Windows.

The tests were assuming POSIX paths.

R=rnystrom@google.com
BUG=

Review URL: https://codereview.chromium.org//66073002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart/pkg/watcher@30091 260f80e4-7a28-3924-810f-c04153c831b5
1 file changed
tree: 40a5f236fa2337d4d6f0a84f9877a2490c1a0883
  1. pkgs/