Add LayerListMutationDetector to hittesting.
https://bugs.webkit.org/show_bug.cgi?id=157758

Reviewed by Simon Fraser.

Hittesting is supposed to be readonly.

* rendering/RenderLayer.cpp:
(WebCore::RenderLayer::hitTestLayer):
* rendering/RenderLayer.h:
(WebCore::RenderLayer::clearZOrderLists):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@201071 268f45cc-cd09-0410-ab3c-d52691b4dbfc
3 files changed