[Webkit-unassigned] [Bug 261585] New: Support multiple backing sharing providers when scrollers are nested

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=261585

            Bug ID: 261585
           Summary: Support multiple backing sharing providers when
                    scrollers are nested
           Product: WebKit
           Version: Safari 16
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Compositing
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: simon.fraser at apple.com
                CC: simon.fraser at apple.com

Bug 261302 is limiting compositing backing sharing (RenderLayerCompositor::BackingSharingState) to non-overlapping, sibling overflow scrollers, but it would also be good to support nested scrollers too.

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