We don't use CATiledLayer at all on Mac anymore. We have to keep LayerTypeTiledLayer around for Windows, for now, but we can get rid of WebTiledLayer and some related Mac-specific code.
Created attachment 215265 [details]
Comment on attachment 215265 [details]
Clearing flags on attachment: 215265
Committed r158096: <http://trac.webkit.org/changeset/158096>
All reviewed patches have been landed. Closing bug.