Because the test uses dumpDOMAsWebArchive(), the expected results extension should be .webarchive instead of .txt.
Created attachment 157793 [details]
I assume run-webkit-tests plays nice with .webarchive files?
It did the last time I checked.
The rest of that directory uses the .webarchive extension instead of the .txt extension. And yes rwt works with those files.
Comment on attachment 157793 [details]
Clearing flags on attachment: 157793
Committed r125354: <http://trac.webkit.org/changeset/125354>
All reviewed patches have been landed. Closing bug.