NEW 196039
Detect when layers can behave as a stacking container, to reduce layer explosion 
https://bugs.webkit.org/show_bug.cgi?id=196039
Summary Detect when layers can behave as a stacking container, to reduce layer explosion
Simon Fraser (smfr)
Reported 2019-03-20 15:37:25 PDT
In some cases it's beneficial to treat layer as a CSS stacking context even if it isn't one, so that we create fewer descendant compositing layers. This will involve bringing back code similar to the code I removed in r236424 and r236611.
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Radar WebKit Bug Importer
Comment 1 2019-03-20 15:37:43 PDT
<rdar://problem/49082455>
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