We're adding support to store accelerated effects on GraphicsLayer in bug 253240, so once that's done we'll need to generate those effects for a RenderLayerBacking.
Pull request: https://github.com/WebKit/WebKit/pull/10960
Committed 261120@main (3311ab9ea59b): <https://commits.webkit.org/261120@main> Reviewed commits have been landed. Closing PR #10960 and removing active labels.
<rdar://problem/106185533>