Fix segment fault issue bring by last cl.

Fix segment fault issue bring by last cl https://codereview.chromium.org/1857213004/
Fix segment fault issue related to launcher context menu.

BUG=602918
Committed: https://crrev.com/6ebd2ffdf5c5973d95632e25e544cde378828bda
Cr-Commit-Position: refs/heads/master@{#387013}

[lgcheng, 2016-04-13 16:20:00]

The CQ bit was checked by lgcheng@google.com to run a CQ dry run

[commit-bot: I haz the power, 2016-04-13 16:20:08]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1888513002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1888513002/1

[lgcheng, 2016-04-13 16:24:09]

Description was changed from

==========
Fix segment fault issue bring by last cl.
Fix segment fault issue related to launcher context menu.

BUG= 602918
==========

to

==========
Fix segment fault issue bring by last cl.
Fix segment fault issue related to launcher context menu.

BUG= 602918
==========

[lgcheng, 2016-04-13 16:24:10]

lgcheng@google.com changed reviewers:
+ stevenjb@chromium.org

[lgcheng, 2016-04-13 16:25:53]

Hi Steven,

PTAL at this patch.

It turns out there is actually a bug in my last patch 
https://codereview.chromium.org/1857213004/ which can cause segment fault. This
patch fix that issue.

Thanks

[lgcheng, 2016-04-13 16:26:08]

Description was changed from

==========
Fix segment fault issue bring by last cl.
Fix segment fault issue related to launcher context menu.

BUG= 602918
==========

to

==========
Fix segment fault issue bring by last cl
https://codereview.chromium.org/1857213004/
Fix segment fault issue related to launcher context menu.

BUG= 602918
==========

[lgcheng, 2016-04-13 16:38:21]

lgcheng@google.com changed reviewers:
+ yiyix@chromium.org

[lgcheng, 2016-04-13 16:38:22]

Adding Yi so that you can get update in time.

[stevenjb, 2016-04-13 16:54:39]

lgtm

[lgcheng, 2016-04-13 16:56:42]

On 2016/04/13 16:54:39, stevenjb wrote:
> lgtm

Thanks for review!

[commit-bot: I haz the power, 2016-04-13 17:10:56]

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

[commit-bot: I haz the power, 2016-04-13 17:10:57]

Dry run: This issue passed the CQ dry run.

[lgcheng, 2016-04-13 17:11:15]

The CQ bit was checked by lgcheng@google.com

[commit-bot: I haz the power, 2016-04-13 17:11:59]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1888513002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1888513002/1

[commit-bot: I haz the power, 2016-04-13 17:18:20]

Description was changed from

==========
Fix segment fault issue bring by last cl
https://codereview.chromium.org/1857213004/
Fix segment fault issue related to launcher context menu.

BUG= 602918
==========

to

==========
Fix segment fault issue bring by last cl
https://codereview.chromium.org/1857213004/
Fix segment fault issue related to launcher context menu.

BUG= 602918
==========

[commit-bot: I haz the power, 2016-04-13 17:18:21]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-04-13 17:19:22]

Description was changed from

==========
Fix segment fault issue bring by last cl
https://codereview.chromium.org/1857213004/
Fix segment fault issue related to launcher context menu.

BUG= 602918
==========

to

==========
Fix segment fault issue bring by last cl
https://codereview.chromium.org/1857213004/
Fix segment fault issue related to launcher context menu.

BUG= 602918

Committed: https://crrev.com/6ebd2ffdf5c5973d95632e25e544cde378828bda
Cr-Commit-Position: refs/heads/master@{#387013}
==========

[commit-bot: I haz the power, 2016-04-13 17:19:23]

Patchset 1 (id:??) landed as
https://crrev.com/6ebd2ffdf5c5973d95632e25e544cde378828bda
Cr-Commit-Position: refs/heads/master@{#387013}