As a first step to adding smooth scrolling for Mac WebKit2, we should add a stubbed out ScrollAnimator for the Mac and enable smooth scrolling. There should be no change in behavior.
Created attachment 74138 [details] Patch
Landed in r72232.
http://trac.webkit.org/changeset/72232 might have broken SnowLeopard Intel Release (Tests) The following tests are not passing: fast/blockflow/vertical-font-fallback.html fast/repaint/repaint-across-writing-mode-boundary.html