How to reproduce the problem: 1. Open the URL: data:text/html,<style>body { zoom: 2; } ::-webkit-details-marker { border: 4px solid lime; }</style><details><summary>See detail</summary></details> 2. See the triangle Expected: The triangle is drawn inside the green border. Actual: The triangle is drawn on the green border.
Created attachment 138287 [details] Patch
Comment on attachment 138287 [details] Patch I hope we could get rid of RenderDetailsMarker by using SVG in shadow DOM. But it's a different story...
Comment on attachment 138287 [details] Patch Clearing flags on attachment: 138287 Committed r114973: <http://trac.webkit.org/changeset/114973>
All reviewed patches have been landed. Closing bug.
(In reply to comment #2) > I hope we could get rid of RenderDetailsMarker by using SVG in shadow DOM. But it's a different story... SVG dependency from HTML sounds not good.