We can delete MIMESniffing.cpp and MIMESniffing.h, because they are not used since Qt dropped.
Created attachment 237619 [details] Proposed patch
Comment on attachment 237619 [details] Proposed patch Clearing flags on attachment: 237619 Committed r173261: <http://trac.webkit.org/changeset/173261>
All reviewed patches have been landed. Closing bug.