Unreviewed correctness fix: use lroundf instead of lround for a float to int conversion.

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


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@148061 268f45cc-cd09-0410-ab3c-d52691b4dbfc
Add liveness tests to JSC API entry points
https://bugs.webkit.org/show_bug.cgi?id=114318

Reviewed by Filip Pizlo.

Add simple checks for the existence of a method table on any
JSCells passed across the API.  This in turn forces a structure
validity test.

* API/APICast.h:
(toJS):
(toJSForGC):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@148062 268f45cc-cd09-0410-ab3c-d52691b4dbfc