I didn't add some of libGLESv2 in https://bugs.webkit.org/show_bug.cgi?id=132367 and there are a few unused files that are no longer in ANGLE that I forgot to remove.
Created attachment 230595 [details] patch
Note that there are important steps to take when updating ANGLE. See http://trac.webkit.org/wiki/UpdatingANGLE
http://trac.webkit.org/changeset/168115