DocumentType.publicId / systemId should never return null as these attributes are not nullable in the IDL: https://dom.spec.whatwg.org/#interface-documenttype Instead we should return the empty string. Firefox and Chrome match the specification.
Created attachment 269324 [details] Patch
Comment on attachment 269324 [details] Patch Clearing flags on attachment: 269324 Committed r195336: <http://trac.webkit.org/changeset/195336>
All reviewed patches have been landed. Closing bug.