Rename MockScrollAnimatorEnabled to MockScrollbarsControllerEnabled
Created attachment 447490 [details] Patch
Created attachment 447500 [details] Patch
/Volumes/Data/worker/Commit-Queue/build/LayoutTests/ChangeLog neither lists a valid reviewer nor contains the string "Unreviewed" or "Rubber stamp" (case insensitive).
https://trac.webkit.org/changeset/287227/webkit
<rdar://problem/86673460>