All dumpAsText tests started failing on WebKit2 between r68918 and r68977, according to the Windows WebKit2 bot. r68966 seems the most likely culprit. It looks like the failures are due to a missing newline at the end of the dumpAsText output.
<rdar://problem/8514104>
Committed r69129: <http://trac.webkit.org/changeset/69129>