Implement the interface HTMLDetailsElement ( // https://html.spec.whatwg.org/multipage/#htmldetailselement )
All tests pass in
tests/wpt/web-platform-tests/html/semantics/interactive-elements/the-details-element/details.html
&
tests/wpt/web-platform-tests/html/semantics/interactive-elements/the-details-element/toggleEvent.html
Anyway, no change is made on layout and attribute open currently has no effect, it just fires a toggle event.
Source-Repo: https://github.com/servo/servo
Source-Revision: 5b2d2c0ed88e8b635f91c3421b472c804dd1afe4
