Fix a DCHECK failure in PopupMenuImpl::setValueAndClosePopup().

Fix a DCHECK failure in PopupMenuImpl::setValueAndClosePopup().

|stringValue| may be empty.

BUG=629029
Committed: https://crrev.com/676be06451fec4d4f2f0bab075f3b627ec1d1597
Cr-Commit-Position: refs/heads/master@{#419991}

[tkent, 2016-09-21 05:40:06]

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

[commit-bot: I haz the power, 2016-09-21 05:40:22]

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

[tkent, 2016-09-21 05:40:40]

Description was changed from

==========
Fix a DCHECK failure in PopupMenuImpl::setValueAndClosePopup().

|stringValue| may be empty.

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

to

==========
Fix a DCHECK failure in PopupMenuImpl::setValueAndClosePopup().

|stringValue| may be empty.

BUG=629029
==========

[tkent, 2016-09-21 05:40:58]

tkent@chromium.org changed reviewers:
+ keishi@chromium.org

[tkent, 2016-09-21 05:40:59]

Hattori-san, would you review this please?

[keishi, 2016-09-21 05:59:50]

LGTM

[tkent, 2016-09-21 06:55:49]

The CQ bit was unchecked by tkent@chromium.org

[tkent, 2016-09-21 06:55:52]

The CQ bit was checked by tkent@chromium.org

[commit-bot: I haz the power, 2016-09-21 06:56:09]

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, 2016-09-21 07:03:08]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-09-21 07:06:32]

Description was changed from

==========
Fix a DCHECK failure in PopupMenuImpl::setValueAndClosePopup().

|stringValue| may be empty.

BUG=629029
==========

to

==========
Fix a DCHECK failure in PopupMenuImpl::setValueAndClosePopup().

|stringValue| may be empty.

BUG=629029

Committed: https://crrev.com/676be06451fec4d4f2f0bab075f3b627ec1d1597
Cr-Commit-Position: refs/heads/master@{#419991}
==========

[commit-bot: I haz the power, 2016-09-21 07:06:32]

Patchset 1 (id:??) landed as
https://crrev.com/676be06451fec4d4f2f0bab075f3b627ec1d1597
Cr-Commit-Position: refs/heads/master@{#419991}