Change description:
Ship text-decoration-(color|style|line) features, that have been experimental web platform features for a long time.

Changes to API surface:
* new CSS properties text-decoration-(style|color|line)
* full support for CSS3 options of text-decoration: shorthand.

Links:
Public standards discussion: https://drafts.csswg.org/css-text-decor-3/

Support in other browsers:
Internet Explorer: Not available
Firefox: Shipped
Safari: Shipped prefixed.

*Make sure to fill in any labels with a -?, including all OSes this change
affects. Feel free to leave other labels at the defaults.