Reduce HTMLMediaElement BehaviorRestrictions to a single state bit

Reduce HTMLMediaElement BehaviorRestrictions to a single state bit

There's only a single restriction left, so make it more obvious.

Although not the main purpose, this reduces sizeof(HTMLMediaElement) by
4 bytes, from 584 to 580 on Mac Debug.

BUG=none

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=167864

[philipj_slow, 2014-02-25 18:04:15]

Depends on https://codereview.chromium.org/178003008/

[acolwell GONE FROM CHROMIUM, 2014-02-25 18:09:52]

lgtm

[philipj_slow, 2014-02-25 22:01:26]

The CQ bit was checked by philipj@opera.com

[commit-bot: I haz the power, 2014-02-25 22:01:42]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/philipj@opera.com/177123006/1

[commit-bot: I haz the power, 2014-02-25 23:09:45]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/philipj@opera.com/177123006/1

[commit-bot: I haz the power, 2014-02-25 23:27:58]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/philipj@opera.com/177123006/1

[Paweł Hajdan Jr., 2014-02-26 05:45:23]

The CQ bit was unchecked by phajdan.jr@chromium.org

[Paweł Hajdan Jr., 2014-02-26 06:01:19]

The CQ bit was checked by phajdan.jr@chromium.org

[commit-bot: I haz the power, 2014-02-26 06:06:58]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/philipj@opera.com/177123006/1

[commit-bot: I haz the power, 2014-02-26 08:53:00]

Change committed as 167864