Continue removing glue code from RenderLayer that was recently added in r271559
Created attachment 417869 [details] Patch, v1 We can use RenderLayerScrollableArea directly instead and get rid of the glue code that was only added to ease the landing of the patch on bug 60305
Created attachment 417870 [details] Patch, v2
<rdar://problem/73478267>
Committed r271740: <https://trac.webkit.org/changeset/r271740>