The TreeWalker interface should not have [NoInterfaceObject] according to its specification:
Firefox follows the specification.
Created attachment 203751 [details]
Created attachment 203753 [details]
Rebaseline fast/dom/dom-constructors.html as well.
Comment on attachment 203753 [details]
Clearing flags on attachment: 203753
Committed r151200: <http://trac.webkit.org/changeset/151200>
All reviewed patches have been landed. Closing bug.