See the patch.
Created attachment 373316 [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
Comment on attachment 373316 [details] Patch Clearing flags on attachment: 373316 Committed r247048: <https://trac.webkit.org/changeset/247048>
All reviewed patches have been landed. Closing bug.