MediaPlayerPrivateAVFoundationObjC should use [AVURLAsset isPlayableExtendedMIMEType:] so it can fully support the MIME type "codecs" parameter.
<rdar://problem/9278468>
Created attachment 89405 [details] Proposed patch.
Comment on attachment 89405 [details] Proposed patch. r=me
http://trac.webkit.org/changeset/83765