mac: Fix an attachment broker race condition.

mac: Fix an attachment broker race condition.

If a source or destination communication channel has not been established, the
attachment broker will wait for the connection, rather than immediately failing
to broker the attachment.

BUG=609262
Committed: https://crrev.com/7d2ba5053f23428cb3aad549b2399a4699da339a
Cr-Commit-Position: refs/heads/master@{#393915}

[erikchen, 2016-05-16 19:27:30]

The CQ bit was checked by erikchen@chromium.org to run a CQ dry run

[erikchen, 2016-05-16 19:27:47]

erikchen@chromium.org changed reviewers:
+ tsepez@chromium.org

[erikchen, 2016-05-16 19:27:48]

tsepez: Please review.

[commit-bot: I haz the power, 2016-05-16 19:28:07]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1978353003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1978353003/1

[Tom Sepez, 2016-05-16 19:40:57]

lgtm

[commit-bot: I haz the power, 2016-05-16 20:22:10]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-05-16 20:22:11]

Dry run: This issue passed the CQ dry run.

[erikchen, 2016-05-16 20:23:27]

The CQ bit was checked by erikchen@chromium.org

[commit-bot: I haz the power, 2016-05-16 20:23:53]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1978353003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1978353003/1

[commit-bot: I haz the power, 2016-05-16 21:07:26]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-05-16 21:08:43]

Description was changed from

==========
mac: Fix an attachment broker race condition.

If a source or destination communication channel has not been established, the
attachment broker will wait for the connection, rather than immediately failing
to broker the attachment.

BUG=609262
==========

to

==========
mac: Fix an attachment broker race condition.

If a source or destination communication channel has not been established, the
attachment broker will wait for the connection, rather than immediately failing
to broker the attachment.

BUG=609262

Committed: https://crrev.com/7d2ba5053f23428cb3aad549b2399a4699da339a
Cr-Commit-Position: refs/heads/master@{#393915}
==========

[commit-bot: I haz the power, 2016-05-16 21:08:44]

Patchset 1 (id:??) landed as
https://crrev.com/7d2ba5053f23428cb3aad549b2399a4699da339a
Cr-Commit-Position: refs/heads/master@{#393915}