There are several places that do: RenderLayer* stackingContext = stackingContext(); if (stackingContext) stackingContext->dirtyZOrderLists(); This should be wrapped into a single method.
Created attachment 23762 [details] Patch, changelog
Comment on attachment 23762 [details] Patch, changelog r=me
Committed r36864 M WebCore/rendering/RenderObject.cpp M WebCore/rendering/RenderLayer.cpp M WebCore/rendering/RenderLayer.h M WebCore/ChangeLog r36864 = 557a047e17efaaa00f818db80aba502ad4469800 (trunk)