boxHeaderSize is not a member of WebCore::ISOBox.
<rdar://problem/35611906>
Created attachment 327252 [details] Patch
Comment on attachment 327252 [details] Patch Thanks for reviewing!
Comment on attachment 327252 [details] Patch Clearing flags on attachment: 327252 Committed r225000: <https://trac.webkit.org/changeset/225000>
All reviewed patches have been landed. Closing bug.