scroll anchoring

Hi,

This is a reminder that the scroll anchoring opt out / exclusion API
(overflow-anchor) has been proposed at

https://github.com/w3c/csswg-drafts/issues/676

and is expected to ship
<https://groups.google.com/a/chromium.org/forum/#!msg/blink-dev/VJmxBRYGVIE/CogbbYWXCAAJ>
in Chrome soon.  Let me know if you have feedback or concerns.

Thanks,
Steve