Bug 248569

Summary: Support ::backdrop renderers on all elements
Product: WebKit Reporter: Tim Nguyen (:ntim) <ntim>
Component: Layout and RenderingAssignee: Tim Nguyen (:ntim) <ntim>
Status: RESOLVED FIXED    
Severity: Normal CC: bfulgham, simon.fraser, webkit-bug-importer, zalan
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   

Description Tim Nguyen (:ntim) 2022-11-30 15:58:11 PST 
Some renderers don't expect extra children like RenderVideo, which causes the ::backdrop to not be laid out. We could fix all renderers to lay out children, but that's probably unnecessary complexity and it's likely to miss certain cases.

So let's append all ::backdrop to the RenderView whenever we can.
Comment 1 Radar WebKit Bug Importer 2022-11-30 15:59:05 PST 
<rdar://problem/102833504>
Comment 2 Tim Nguyen (:ntim) 2022-11-30 16:00:52 PST 
Pull request: https://github.com/WebKit/WebKit/pull/6997
Comment 3 Tim Nguyen (:ntim) 2022-11-30 19:05:17 PST 
Pull request: https://github.com/WebKit/WebKit/pull/7005
Comment 4 EWS 2022-12-03 16:11:47 PST 
Committed 257337@main (fc7f34162f24): <https://commits.webkit.org/257337@main>

Reviewed commits have been landed. Closing PR #7005 and removing active labels.