For now, we don't want the presence of a filter to drop you into a compositing layer. Later on we will add heuristics to determine when to use compositing layers, when to use CoreImage with hardware accelerated rendering and when to use the full software path.
Created attachment 121762 [details] Patch
Comment on attachment 121762 [details] Patch Needs a testcase.
Created attachment 121883 [details] Patch
Comment on attachment 121883 [details] Patch Attachment 121883 [details] did not pass gtk-ews (gtk): Output: http://queues.webkit.org/results/11196176
Committed r104622: <http://trac.webkit.org/changeset/104622>