Move CanvasRenderingContext2DSettings down to CanvasRenderingContext2DBase so it can be used there (and to support OffscreenCanvas)
Created attachment 428694 [details] Patch
Created attachment 428708 [details] Patch
Committed r277543 (237771@main): <https://commits.webkit.org/237771@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 428708 [details].
<rdar://problem/78060631>