CustomPaintImage being in platform/graphics is a layering violation
Created attachment 427676 [details] Patch
<rdar://problem/77848911>
Created attachment 428696 [details] Patch
Created attachment 428697 [details] Patch
Committed r277529 (237757@main): <https://commits.webkit.org/237757@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 428697 [details].