[Mac] Fix a potential crash in the permission bubble controller

[Mac] Fix a potential crash in the permission bubble controller

BUG=706489
Review-Url: https://codereview.chromium.org/2786943003
Cr-Commit-Position: refs/heads/master@{#460948}
Committed: https://chromium.googlesource.com/chromium/src/+/2b0f410e97c2f08f08f3e162bc995c7c4c237970

[spqchan, 2017-03-30 22:19:18]

Description was changed from

==========
[Mac] Fix a potential crash in the permission bubble controller

BUG=
==========

to

==========
[Mac] Fix a potential crash in the permission bubble controller

BUG=706489
==========

[spqchan, 2017-03-30 22:19:26]

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

[commit-bot: I haz the power, 2017-03-30 22:20:36]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-03-30 23:21:10]

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

[commit-bot: I haz the power, 2017-03-30 23:21:10]

Dry run: This issue passed the CQ dry run.

[spqchan, 2017-03-30 23:32:06]

spqchan@chromium.org changed reviewers:
+ avi@chromium.org

[spqchan, 2017-03-30 23:32:07]

PTAL

[Avi (use Gerrit), 2017-03-30 23:40:31]

lgtm

[spqchan, 2017-03-30 23:41:56]

On 2017/03/30 23:40:31, Avi wrote:
> lgtm

thanks!

[spqchan, 2017-03-30 23:42:00]

The CQ bit was checked by spqchan@chromium.org

[commit-bot: I haz the power, 2017-03-30 23:43:10]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-03-31 00:19:45]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1490917320204930, "parent_rev":
"d88aa1048604920b9cc979d2ca7b2e2ae2373271", "commit_rev":
"2b0f410e97c2f08f08f3e162bc995c7c4c237970"}

[commit-bot: I haz the power, 2017-03-31 00:21:19]

Description was changed from

==========
[Mac] Fix a potential crash in the permission bubble controller

BUG=706489
==========

to

==========
[Mac] Fix a potential crash in the permission bubble controller

BUG=706489

Review-Url: https://codereview.chromium.org/2786943003
Cr-Commit-Position: refs/heads/master@{#460948}
Committed:
https://chromium.googlesource.com/chromium/src/+/2b0f410e97c2f08f08f3e162bc99...
==========

[commit-bot: I haz the power, 2017-03-31 00:21:21]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/2b0f410e97c2f08f08f3e162bc99...