Fix crash in EnrollmentScreenHandler for Active Directory devices.

Fix crash in EnrollmentScreenHandler for Active Directory devices.

BUG=682779
TEST=manual

Review-Url: https://codereview.chromium.org/2655573003
Cr-Commit-Position: refs/heads/master@{#445788}
Committed: https://chromium.googlesource.com/chromium/src/+/a36717f4c79513664b45ba0248ebd731cf6e3e0c

[Roman Sorokin (ftl), 2017-01-24 12:16:06]

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

[commit-bot: I haz the power, 2017-01-24 12:16:17]

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

[Roman Sorokin (ftl), 2017-01-24 12:16:48]

rsorokin@chromium.org changed reviewers:
+ achuith@chromium.org

[Roman Sorokin (ftl), 2017-01-24 12:16:48]

Hey Achuith, PTAL. Thanks!

[commit-bot: I haz the power, 2017-01-24 12:42:55]

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

[commit-bot: I haz the power, 2017-01-24 12:42:55]

Dry run: This issue passed the CQ dry run.

[achuithb, 2017-01-24 19:43:01]

lgtm

[Thiemo Nagel, 2017-01-24 19:54:42]

The CQ bit was checked by tnagel@chromium.org

[commit-bot: I haz the power, 2017-01-24 19:55:29]

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, 2017-01-24 20:00:59]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1485287682969360, "parent_rev":
"655534106723e235955ff0b4aec4cadddbd638ab", "commit_rev":
"a36717f4c79513664b45ba0248ebd731cf6e3e0c"}

[commit-bot: I haz the power, 2017-01-24 20:01:47]

Description was changed from

==========
Fix crash in EnrollmentScreenHandler for Active Directory devices.

BUG=682779
TEST=manual
==========

to

==========
Fix crash in EnrollmentScreenHandler for Active Directory devices.

BUG=682779
TEST=manual

Review-Url: https://codereview.chromium.org/2655573003
Cr-Commit-Position: refs/heads/master@{#445788}
Committed:
https://chromium.googlesource.com/chromium/src/+/a36717f4c79513664b45ba0248eb...
==========

[commit-bot: I haz the power, 2017-01-24 20:01:49]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/a36717f4c79513664b45ba0248eb...