https://bugs.webkit.org/show_bug.cgi?id=106723

Patch by Dima Gorbik <dgorbik@apple.com> on 2013-01-13
Reviewed by Antti Koivisto.

Source/WebCore:

Fixes a regression caused by r138966. Setting a pseudoId in TextTrackCue::updateDisplayTree for m_allDocumentNodes
was triggering recalculating styles the next run loop. Now when this was removed we append the WebVTT tree after its children have
been marked by markFutureAndPastNodes so that correct styles are set within this append call.

Test: media/track/track-css-cue-lifetime.html

* html/track/TextTrackCue.cpp:
(WebCore::TextTrackCue::markFutureAndPastNodes): changing the type of the first argument because DocumentFragment is not a subclass
of Element.
(WebCore::TextTrackCue::updateDisplayTree): appending the WebVTT rendering tree after its children have been marked properly.
* html/track/TextTrackCue.h:
(TextTrackCue):

LayoutTests:

* media/track/captions-webvtt/styling-lifetime.vtt: Added.
* media/track/track-css-cue-lifetime-expected.txt: Added.
* media/track/track-css-cue-lifetime.html: Added.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@139562 268f45cc-cd09-0410-ab3c-d52691b4dbfc