NEW 210443
Implement layer-based custom scrollbars 
https://bugs.webkit.org/show_bug.cgi?id=210443
Summary Implement layer-based custom scrollbars
Simon Fraser (smfr)
Reported 2020-04-13 11:30:53 PDT
Custom scrollbars are currently just painted into the scroller's backing store. I'll fix that so they get painted into their own layers, but longer term we want to make a layer for the thumb, at least, so we can move it on the scrolling thread.
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Radar WebKit Bug Importer
Comment 1 2020-04-13 11:31:19 PDT
<rdar://problem/61727923>
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