Fix build for r145397 (part 2)

Unreviewed.

* html/track/TextTrackCue.cpp:
(WebCore::TextTrackCue::getDisplayTree):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@145404 268f45cc-cd09-0410-ab3c-d52691b4dbfc
Compile fix. Rubber-stamp by Eric Seidel.

* html/shadow/MediaControlElements.cpp:
(WebCore::MediaControlTextTrackContainerElement::updateDisplay):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@145405 268f45cc-cd09-0410-ab3c-d52691b4dbfc