In RenderLayer::localBoundingBox, we inflate the bounds based on the maximum CSS outline size seen on the page. The maximal outline size is stored on RenderView, where there is a FIXME that sums it up: // FIXME: This is ugly; it would be nice to have a better way to do this. void RenderView::setMaximalOutlineSize(int o)
rdar://problem/13699130
This was added in the past but removed in this commit: https://github.com/WebKit/WebKit/commit/5b52c6c0f8213264aeed5d8898110430f72273a7 Line 857 - Source/WebCore/rendering/RenderView.cpp Is this needed anymore?
*** This bug has been marked as a duplicate of bug 153299 ***