cros: Fix clusterfuzz crash opening stylus palette

cros: Fix clusterfuzz crash opening stylus palette

Clusterfuzz skips the login pathway and injects keystrokes immediately on
startup. This can trigger accelerators before the status area is initialized.
Add a null check -- this case doesn't happen in production.

BUG=702480
TEST=clusterfuzz

Review-Url: https://codereview.chromium.org/2758863002
Cr-Commit-Position: refs/heads/master@{#457827}
Committed: https://chromium.googlesource.com/chromium/src/+/8a9f744dfa2a4299d50b3474b0d9699070158e0f

[James Cook, 2017-03-17 17:40:30]

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

[commit-bot: I haz the power, 2017-03-17 17:40:54]

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

[James Cook, 2017-03-17 17:40:57]

jamescook@chromium.org changed reviewers:
+ jdufault@chromium.org

[James Cook, 2017-03-17 17:40:57]

jdufault, please take a look.

[jdufault, 2017-03-17 17:51:31]

lgtm

[James Cook, 2017-03-17 17:51:50]

The CQ bit was unchecked by jamescook@chromium.org

[James Cook, 2017-03-17 17:51:53]

The CQ bit was checked by jamescook@chromium.org

[commit-bot: I haz the power, 2017-03-17 17:52:23]

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, 2017-03-17 18:39:23]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1489773113930750, "parent_rev":
"b471e5623d5becab9255576eeb0cab20d32d61e9", "commit_rev":
"8a9f744dfa2a4299d50b3474b0d9699070158e0f"}

[commit-bot: I haz the power, 2017-03-17 18:40:08]

Description was changed from

==========
cros: Fix clusterfuzz crash opening stylus palette

Clusterfuzz skips the login pathway and injects keystrokes immediately on
startup. This can trigger accelerators before the status area is initialized.
Add a null check -- this case doesn't happen in production.

BUG=702480
TEST=clusterfuzz
==========

to

==========
cros: Fix clusterfuzz crash opening stylus palette

Clusterfuzz skips the login pathway and injects keystrokes immediately on
startup. This can trigger accelerators before the status area is initialized.
Add a null check -- this case doesn't happen in production.

BUG=702480
TEST=clusterfuzz

Review-Url: https://codereview.chromium.org/2758863002
Cr-Commit-Position: refs/heads/master@{#457827}
Committed:
https://chromium.googlesource.com/chromium/src/+/8a9f744dfa2a4299d50b3474b0d9...
==========

[commit-bot: I haz the power, 2017-03-17 18:40:09]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/8a9f744dfa2a4299d50b3474b0d9...