Allow WebsitePolicies API object to be bridged to _WKWebsitePolicies. We never hooked up _WKWebsitePolicies in Object::newObject() when we implemented this object in http://trac.webkit.org/changeset/209558 for some reason.
<rdar://problem/36197711>
Created attachment 330144 [details] Patch
https://trac.webkit.org/changeset/226286/webkit