The media UI controls may not be made visible immediately, or ever, so they should be attached lazily.
Created attachment 209199 [details] Proposed patch
Comment on attachment 209199 [details] Proposed patch rs=me
Comment on attachment 209199 [details] Proposed patch Clearing flags on attachment: 209199 Committed r154345: <http://trac.webkit.org/changeset/154345>
All reviewed patches have been landed. Closing bug.