when the abs(offset) value is higher than the border radius value.
Created attachment 273917 [details] Patch
Comment on attachment 273917 [details] Patch View in context: https://bugs.webkit.org/attachment.cgi?id=273917&action=review > Source/WebCore/platform/graphics/PathUtilities.cpp:439 > + FloatSize adjustedRadius = radius; I think you can expandedTo/shrunkTo here.
Committed r198142: <http://trac.webkit.org/changeset/198142>