Wrap Directory.watch on linux for the watcher package.

R=rnystrom@google.com
BUG=14428

Review URL: https://codereview.chromium.org//46843003

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart/pkg/watcher@30081 260f80e4-7a28-3924-810f-c04153c831b5
17 files changed
tree: de92da2284ea37610d6765e897123828a254e030
  1. pkgs/