ENABLE_SMOOTH_SCROLLING is buried in a block of all private options, but public by accident. Oops.
Ack. Sorry about that.
Created attachment 251812 [details] Patch
Comment on attachment 251812 [details] Patch Clearing flags on attachment: 251812 Committed r183451: <http://trac.webkit.org/changeset/183451>
All reviewed patches have been landed. Closing bug.