This addresses #849. This PR cannot land until the corresponding PR (https://github.com/servo/html5ever/pull/91) in html5ever lands. I've done some simple testing of this code, but I don't consider it thorougly tested yet. I wanted to start getting feedback about the overall design before I spend more time polishing the details, and testing.
Source-Repo: https://github.com/servo/servo
Source-Revision: b2fb06d6e25d6728d6000c283ed1dab1e8bfabb1
fixes#4603
- Add definition to the Element.webidl and implementation to element.rs.
- Create inclusive_ancestors helper in NodeHelpers
- Update test expectations
Source-Repo: https://github.com/servo/servo
Source-Revision: ea83ffdb980d290a910e78b96c3f056280487ac7
