These are useful for WebKit level cache implementation.
Created attachment 240620 [details] patch
Reverted r175342 for reason: a file ended up in a wrong directory Committed r175343: <http://trac.webkit.org/changeset/175343>
Created attachment 240622 [details] updated patch
Created attachment 240623 [details] another
http://trac.webkit.org/changeset/175348
Oops, ChangeLog mismerged and it picked up wrong commit message. Leaving as-is since it is otherwise fine.