The last WebKit revision in Blink is
http://trac.webkit.org/changeset/147503
It is possible to figure this out by searching in Blink commits for
"Blink" and finding "4b7159b920caefd3bc8d48a35daddd9bbac862dc Add
codereview.settings for Blink". This is the first Blink commit. The
previous one is "5dedb5aca52fa8a70b3fc21dd15e0760652be26b Use
cross-port testRunner methods in
fast/loader/url-selected-user-gesture.html
https://bugs.webkit.org/show_bug.cgi?id=113827".