TiledBackingStore related code in the frame looks dead code.
Created attachment 230644 [details] Patch
Added mrobinson for double check. If I remember correctly, WebKit1/Gtk used TiledBackingStore of Frame but WebKit2/Gtk does not use it now.
I don't think we use the tiled backing store in WebKitGTK+.
Comment on attachment 230644 [details] Patch thanks
Comment on attachment 230644 [details] Patch Clearing flags on attachment: 230644 Committed r168151: <http://trac.webkit.org/changeset/168151>
All reviewed patches have been landed. Closing bug.