While reviewing another patch, I noticed a bunch of duplication between the GTK, EFL, Windows, and Mac CMake files.
Created attachment 276398 [details] Patch
Comment on attachment 276398 [details] Patch Clearing flags on attachment: 276398 Committed r199549: <http://trac.webkit.org/changeset/199549>
All reviewed patches have been landed. Closing bug.
Build fix in http://trac.webkit.org/changeset/199562