The runtime availability of the full screen API is currently controlled by a user default. We should change that setting to be enabled by default.
<rdar://problem/9176946>
Created attachment 87018 [details] Patch
This patch seems to be all ChangeLog, no changes. I'll resubmit.
Created attachment 87036 [details] Patch
Committed r82052: <http://trac.webkit.org/changeset/82052>