Add a bunch of debugging prints to the Mac OS watcher.

This should help debug the intermittent, difficult-to-reproduce issues
on the vm-mac-release bot.

R=rnystrom@google.com

Review URL: https://codereview.chromium.org//68293005

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart/pkg/watcher@30181 260f80e4-7a28-3924-810f-c04153c831b5
1 file changed
tree: 0438d3a638cc57afb9ec6f97b2964c0992f7c2b9
  1. pkgs/