I made a build fix after r66448 just for making the Qt-bot happy although, we need to implement qt_wk_didFinishDocumentLoadForFrame function.
Landed in http://trac.webkit.org/changeset/66466
It should not have been closed.
I do not think implementing this is necessary until we have something in the API level that needs it. I would not call this as a bug.
Like I sad before, it is not a bug.