This is mostly the same than bug #159259, CoordinatedDrawingAreaProxy is just a copy paste of DrawingAreaProxyImpl with the non accelerated composited code path removed. We could reuse most of the code by subclassing.
Created attachment 285228 [details] Patch
Created attachment 285229 [details] Try to fix EFL build
Created attachment 285230 [details] Try to fix EFL build
Committed r204249: <http://trac.webkit.org/changeset/204249>