The MediaSessionManagerClient interface isn't used, remove it.
Created attachment 236892 [details] Proposed patch.
Comment on attachment 236892 [details] Proposed patch. r=me. I love removing code!
Comment on attachment 236892 [details] Proposed patch. Clearing flags on attachment: 236892 Committed r172809: <http://trac.webkit.org/changeset/172809>
All reviewed patches have been landed. Closing bug.