Add debugging prints to the Mac OS directory watcher.

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=

Committed: https://code.google.com/p/dart/source/detail?r=30919

[Bob Nystrom, 2013-12-05 22:43:54]

One question, otherwise LGTM.

https://codereview.chromium.org/107403002/diff/1/pkg/watcher/lib/src/director...
File pkg/watcher/lib/src/directory_watcher/mac_os.dart (right):

https://codereview.chromium.org/107403002/diff/1/pkg/watcher/lib/src/director...
pkg/watcher/lib/src/directory_watcher/mac_os.dart:37: super(directory, () => new
_MacOSDirectoryWatcher(directory, _count));
How does ++ work in an initialization list? Should this be _count - 1?

[nweiz, 2013-12-05 22:48:47]

https://codereview.chromium.org/107403002/diff/1/pkg/watcher/lib/src/director...
File pkg/watcher/lib/src/directory_watcher/mac_os.dart (right):

https://codereview.chromium.org/107403002/diff/1/pkg/watcher/lib/src/director...
pkg/watcher/lib/src/directory_watcher/mac_os.dart:37: super(directory, () => new
_MacOSDirectoryWatcher(directory, _count));
On 2013/12/05 22:43:55, Bob Nystrom wrote:
> How does ++ work in an initialization list? Should this be _count - 1?

Come to think of it, there's really no reason the wrapper class should have an
_id at all. Fixed.

[nweiz, 2013-12-05 22:49:10]

Committed patchset #2 manually as r30919 (presubmit successful).