Share some code to dirty z-order and normal flow lists when child layers are added or removed
Created attachment 352329 [details] Patch
Comment on attachment 352329 [details] Patch View in context: https://bugs.webkit.org/attachment.cgi?id=352329&action=review > Source/WebCore/rendering/RenderLayer.cpp:454 > + if (!child.isNormalFlowOnly() || child.firstChild()) { child.isNormalFlowOnly is always false here.
https://trac.webkit.org/changeset/237123/webkit
<rdar://problem/45276600>