This continues #264 Changelog: - Upstream: https://github.com/servo/stylo/compare/d71fd89b781dca6e92ee9a6e683269c3e6a28115...ab77635ba341951b60227b658f4400d1766666f4 - Servo fixups: https://github.com/servo/stylo/compare/5f0a3f7896f84077b7b7121383e027aa8de8f9db...b5fc407614869e5b6753a5cb64af462d30a27136 Servo PR: https://github.com/servo/servo/pull/41696
