"new WebKitPoint(x,y);" currently gets treated exactly the same "new WebKitPoint();". The constructor callback needs to be customized instead of just calling V8Proxy::constructDOMObject().
Created attachment 40252 [details] patch
Comment on attachment 40252 [details] patch r=me.
Comment on attachment 40252 [details] patch Clearing flags on attachment: 40252 Committed r48834: <http://trac.webkit.org/changeset/48834>
All reviewed patches have been landed. Closing bug.