It will be used by the GTK+ port instead of the C API.
Created attachment 312866 [details] Patch
Thanks for the patch. If this patch contains new public API please make sure it follows the guidelines for new WebKit2 GTK+ API. See http://trac.webkit.org/wiki/WebKitGTK/AddingNewWebKit2API
Committed r218261: <http://trac.webkit.org/changeset/218261>