[Cocoa] Adopt VTRegisterSupplementalVideoDecoderIfAvailable
Created attachment 404790 [details] Patch
<rdar://problem/65863651>
Created attachment 404793 [details] Patch
Created attachment 404794 [details] Patch
Created attachment 404795 [details] Patch
Created attachment 404798 [details] Patch
Committed r264659: <https://trac.webkit.org/changeset/264659> All reviewed patches have been landed. Closing bug and clearing flags on attachment 404798 [details].