Reset mode on ancestors when a fullscreen node is removed.

Reset mode on ancestors when a fullscreen node is removed.

Element::removedFrom() is called after a node has been detached and the
parent pointer has been cleared. Thus fullscreen mode has to be reset on
ancestors both in the removed tree and the tree it was linked into
before it was detached.

The patch fixes a corner case where :-webkit-full-screen-ancestor style
was still applied on ancestors after the parent of a fullscreen node was
removed.

BUG=447184
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=188050

[Olle Liljenzin, 2014-12-19 08:42:58]

Please review.

[philipj_slow, 2015-01-08 11:01:01]

Can you link to an existing bug or create one if needed? For stuff that has a
non-trivial chance of being reverted it's nice to have a tracking bug.

The change itself LGTM. The result isn't exactly elegant, but this whole notion
of marking fullscreen ancestors is going away, so I think that's OK.

[Olle Liljenzin, 2015-01-08 14:55:28]

The CQ bit was checked by ollel@opera.com

[commit-bot: I haz the power, 2015-01-08 14:56:35]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/820633002/1

[commit-bot: I haz the power, 2015-01-08 14:59:36]

Committed patchset #1 (id:1) as
https://src.chromium.org/viewvc/blink?view=rev&revision=188050