DownloadProxy::cancel should take a CompletionHandler
Created attachment 410992 [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 https://trac.webkit.org/wiki/WebKitGTK/AddingNewWebKit2API
Committed r268349: <https://trac.webkit.org/changeset/268349> All reviewed patches have been landed. Closing bug and clearing flags on attachment 410992 [details].
<rdar://problem/70206059>