Remove dynamic MediaControlCastButtonElement::shadowPseudoId.

Remove dynamic MediaControlCastButtonElement::shadowPseudoId.

The m_isOverlayButton bit is never set dynamically, and even if it was
it wouldn't work right unless we forced a style recalc at the same time
to make sure we rematched the style with the new pseudo value.

Instead of having this virtual override lets just use the default one
and set the pseudo attribute when the element is created.

BUG=701655
Review-Url: https://codereview.chromium.org/2754523004
Cr-Commit-Position: refs/heads/master@{#457014}
Committed: https://chromium.googlesource.com/chromium/src/+/91afacdd96a5d1ca0a0e3235bc62526834a67463

[esprehn, 2017-03-15 04:48:40]

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

[commit-bot: I haz the power, 2017-03-15 04:49:00]

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

[esprehn, 2017-03-15 06:06:50]

esprehn@chromium.org changed reviewers:
+ nainar@chromium.org, rune@opera.com

[nainar, 2017-03-15 06:23:34]

lgtm

[esprehn, 2017-03-15 06:24:15]

The CQ bit was unchecked by esprehn@chromium.org

[esprehn, 2017-03-15 06:24:17]

The CQ bit was checked by esprehn@chromium.org

[commit-bot: I haz the power, 2017-03-15 06:24:19]

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, 2017-03-15 06:31:15]

CQ is committing da patch.

Bot data: {"patchset_id": 20001, "attempt_start_ts": 1489559057781610,
"parent_rev": "8149bbdddc1e486e27b3957cc9d1f071ae049028", "commit_rev":
"91afacdd96a5d1ca0a0e3235bc62526834a67463"}

[commit-bot: I haz the power, 2017-03-15 06:32:38]

Description was changed from

==========
Remove dynamic MediaControlCastButtonElement::shadowPseudoId.

The m_isOverlayButton bit is never set dynamically, and even if it was
it wouldn't work right unless we forced a style recalc at the same time
to make sure we rematched the style with the new pseudo value.

Instead of having this virtual override lets just use the default one
and set the pseudo attribute when the element is created.

BUG=701655
==========

to

==========
Remove dynamic MediaControlCastButtonElement::shadowPseudoId.

The m_isOverlayButton bit is never set dynamically, and even if it was
it wouldn't work right unless we forced a style recalc at the same time
to make sure we rematched the style with the new pseudo value.

Instead of having this virtual override lets just use the default one
and set the pseudo attribute when the element is created.

BUG=701655

Review-Url: https://codereview.chromium.org/2754523004
Cr-Commit-Position: refs/heads/master@{#457014}
Committed:
https://chromium.googlesource.com/chromium/src/+/91afacdd96a5d1ca0a0e3235bc62...
==========

[commit-bot: I haz the power, 2017-03-15 06:32:39]

Committed patchset #2 (id:20001) as
https://chromium.googlesource.com/chromium/src/+/91afacdd96a5d1ca0a0e3235bc62...

[rune, 2017-03-15 08:36:00]

lgtm