window.open.length should be 0 as all its parameters are optional: - https://html.spec.whatwg.org/multipage/browsers.html#the-window-object It is 2 in WebKit. Firefox and Chrome agree with the specification and return 0.
Created attachment 284826 [details] Patch
Comment on attachment 284826 [details] Patch Clearing flags on attachment: 284826 Committed r203849: <http://trac.webkit.org/changeset/203849>
All reviewed patches have been landed. Closing bug.