There are some rare applications that need to disable requestAnimationFrame, such as offline renderers or archivers. Add a new Preference so that these applications can turn off the rAF machinery.
For some background, the issue we hit is setting up the link to the display timer. We don't actually want to delete the feature - we want the page to still think rAF is there, just make sure that the animation is never serviced.
Created attachment 140377 [details]
Committed r116230: <http://trac.webkit.org/changeset/116230>
Sounds like what you really want is a setting/preference to disable the display link mechanism.