Add debugging prints to the Mac OS directory watcher.

This is a temporary CL that will make it easier to track down and fix the errors
in the mac watcher.

R=rnystrom@google.com
BUG=

Review URL: https://codereview.chromium.org//107403002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart/pkg/watcher@30919 260f80e4-7a28-3924-810f-c04153c831b5
3 files changed
tree: c6de4f1cb6372dbd883fe9438e1aeb4d54a79259
  1. example/
  2. lib/
  3. test/
  4. pubspec.yaml
  5. README.md
README.md

A file watcher. It monitors (currently by polling) for changes to contents of directories and notifies you when files have been added, removed, or modified.