It looks like WebKitLauncher is a bit old compared to what is used for the WebKit Nightly builds.
Created attachment 205653 [details]
Comment on attachment 205653 [details]
Please separate out upstreaming from any changes beyond that which you feel like making.
Created attachment 205719 [details]
Committed r152186: <http://trac.webkit.org/changeset/152186>