Don't create m_style for option element in display:none subtree.

Don't create m_style for option element in display:none subtree.

Instead create a ComputedStyle on demand in rare data like we do for
other display:none elements. This caused out-of-date computed style for
option elements in display:none subtrees because recalcOwnStyle is
skipped for elements without a parentComputedStyle().

R=tkent@chromium.org
BUG=621965
Committed: https://crrev.com/91a68cd74e8fb768959d8ddac8b51eb91585d8c3
Cr-Commit-Position: refs/heads/master@{#402095}

[rune, 2016-06-24 13:44:00]

The CQ bit was checked by rune@opera.com to run a CQ dry run

[commit-bot: I haz the power, 2016-06-24 13:44:17]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2095973002/1

[rune, 2016-06-24 13:51:16]

ptal

[commit-bot: I haz the power, 2016-06-24 14:57:49]

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

[commit-bot: I haz the power, 2016-06-24 14:57:50]

Dry run: This issue passed the CQ dry run.

[tkent, 2016-06-27 00:25:36]

The CQ bit was checked by tkent@chromium.org

[tkent, 2016-06-27 00:25:36]

lgtm

[commit-bot: I haz the power, 2016-06-27 00:25:44]

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, 2016-06-27 01:36:10]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-06-27 01:38:00]

Description was changed from

==========
Don't create m_style for option element in display:none subtree.

Instead create a ComputedStyle on demand in rare data like we do for
other display:none elements. This caused out-of-date computed style for
option elements in display:none subtrees because recalcOwnStyle is
skipped for elements without a parentComputedStyle().

R=tkent@chromium.org
BUG=621965
==========

to

==========
Don't create m_style for option element in display:none subtree.

Instead create a ComputedStyle on demand in rare data like we do for
other display:none elements. This caused out-of-date computed style for
option elements in display:none subtrees because recalcOwnStyle is
skipped for elements without a parentComputedStyle().

R=tkent@chromium.org
BUG=621965

Committed: https://crrev.com/91a68cd74e8fb768959d8ddac8b51eb91585d8c3
Cr-Commit-Position: refs/heads/master@{#402095}
==========

[commit-bot: I haz the power, 2016-06-27 01:38:01]

Patchset 1 (id:??) landed as
https://crrev.com/91a68cd74e8fb768959d8ddac8b51eb91585d8c3
Cr-Commit-Position: refs/heads/master@{#402095}