Revert 187544 "Remove unnecessary sync style recalc for fullscreen."

Revert 187544 "Remove unnecessary sync style recalc for fullscreen."

BUG=448721
> Remove unnecessary sync style recalc for fullscreen.
> 
> There is no code nearby that depends on an up-to-date render tree. The
> render tree will now be updated as part of WillBeginMainFrame. I've not
> been able to construct a test case that can hook into the code between
> the removed call and the new place since the webkitfullscreenchange event
> code is called after WillBeginMainFrame.
> 
> R=jchaffraix@chromium.org
> TEST=fullscreen/
> TEST=media/
> 
> Review URL: https://codereview.chromium.org/816953002

TBR=rune@opera.com

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=188466

[rune, 2015-01-15 12:01:23]

Committed patchset #1 (id:1) manually as r188466.