SELECT element: Fix a DCHECK failure after crrev.com/404091

SELECT element: Fix a DCHECK failure after crrev.com/404091

On Android, selectedOption(), which is the first selected OPTION in tree order,
and m_lastOnChangeOption can be different because Android has menulist+multiple
configuration.

BUG=626328
TBR=keishi@chromium.org

Committed: https://crrev.com/473363e7400323f30342b03a90c2f3da4959fe6a
Cr-Commit-Position: refs/heads/master@{#404302}

[tkent, 2016-07-07 23:27:59]

The CQ bit was checked by tkent@chromium.org

[commit-bot: I haz the power, 2016-07-07 23:29:03]

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, 2016-07-08 01:32:34]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-07-08 01:32:36]

CQ bit was unchecked.

[commit-bot: I haz the power, 2016-07-08 01:34:04]

Description was changed from

==========
SELECT element: Fix a DCHECK failure after crrev.com/404091

On Android, selectedOption(), which is the first selected OPTION in tree order,
and m_lastOnChangeOption can be different because Android has menulist+multiple
configuration.

BUG=626328
TBR=keishi@chromium.org
==========

to

==========
SELECT element: Fix a DCHECK failure after crrev.com/404091

On Android, selectedOption(), which is the first selected OPTION in tree order,
and m_lastOnChangeOption can be different because Android has menulist+multiple
configuration.

BUG=626328
TBR=keishi@chromium.org

Committed: https://crrev.com/473363e7400323f30342b03a90c2f3da4959fe6a
Cr-Commit-Position: refs/heads/master@{#404302}
==========

[commit-bot: I haz the power, 2016-07-08 01:34:05]

Patchset 1 (id:??) landed as
https://crrev.com/473363e7400323f30342b03a90c2f3da4959fe6a
Cr-Commit-Position: refs/heads/master@{#404302}