Fix a flaky test and work around issue 16003 in pkg/watcher.

Fix a flaky test and work around issue 16003 in pkg/watcher.

There's an additional flaky test that this CL is not likely to fix. Additional
debugging is added to help track down the cause of that flake.

R=rnystrom@google.com
BUG=16079
Committed: https://code.google.com/p/dart/source/detail?r=31815

[Bob Nystrom, 2014-01-14 23:45:09]

Passes on my machine. One fix then LGTM.

https://codereview.chromium.org/134963007/diff/1/pkg/watcher/lib/src/director...
File pkg/watcher/lib/src/directory_watcher/mac_os.dart (right):

https://codereview.chromium.org/134963007/diff/1/pkg/watcher/lib/src/director...
pkg/watcher/lib/src/directory_watcher/mac_os.dart:365: print("[$_id] stream
closed");
Put this in if (MacOSDirectoryWatcher.logDebugInfo) and below.

[nweiz, 2014-01-14 23:49:07]

https://codereview.chromium.org/134963007/diff/1/pkg/watcher/lib/src/director...
File pkg/watcher/lib/src/directory_watcher/mac_os.dart (right):

https://codereview.chromium.org/134963007/diff/1/pkg/watcher/lib/src/director...
pkg/watcher/lib/src/directory_watcher/mac_os.dart:365: print("[$_id] stream
closed");
On 2014/01/14 23:45:09, Bob Nystrom wrote:
> Put this in if (MacOSDirectoryWatcher.logDebugInfo) and below.

Good catch! Done.

[nweiz, 2014-01-14 23:49:19]

Committed patchset #1 manually as r31815 (presubmit successful).