Rename ForcePageRenderingUpdatesAt60FPSEnabled to PreferPageRenderingUpdatesNear60FPSEnabled since the new name is more accurate.
Created attachment 421872 [details] Patch
Created attachment 421986 [details] Patch
Created attachment 421991 [details] Patch
Committed r273773: <https://commits.webkit.org/r273773> All reviewed patches have been landed. Closing bug and clearing flags on attachment 421991 [details].
<rdar://problem/74956530>