It could be done when creating the MediaEndpoint if needed.
Created attachment 293155 [details] Patch
Created attachment 293161 [details] Patch
Created attachment 293162 [details] Patch
Comment on attachment 293162 [details] Patch Clearing flags on attachment: 293162 Committed r208100: <http://trac.webkit.org/changeset/208100>
All reviewed patches have been landed. Closing bug.
Reverted r208100 for reason: This change caused LayoutTest crashes under GuardMalloc. Committed r208223: <http://trac.webkit.org/changeset/208223>
<rdar://problem/29026917>