r122676 mistakenly enabled the AVFoundation media engine without regard to the preference.
Created attachment 164626 [details] Proposed patch
<rdar://problem/12313594>
Created attachment 164628 [details] Patch
Comment on attachment 164628 [details] Patch Clearing flags on attachment: 164628 Committed r128964: <http://trac.webkit.org/changeset/128964>
All reviewed patches have been landed. Closing bug.