Use sendWithAsyncReply instead of ValidateCommandCallback
Created attachment 416717 [details] Patch
<rdar://problem/72742292>
Comment on attachment 416717 [details] Patch r=me but please fix GTK build.
Created attachment 417014 [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
Tools/Scripts/svn-apply failed to apply attachment 417014 [details] to trunk. Please resolve the conflicts and upload a new patch.
http://trac.webkit.org/r271162