Implement 'Origin Policy', as spec'ed here: https://github.com/WICG/origin-policy

Eng owner: vogelheim@chromium.org
Product owner: mkwst@chromium.org

Design doc: https://docs.google.com/document/d/1J3pUFRRRhx1DA_8wLng2ahdfgqab-kJU7jw2_FNv19E/view


Are you planning on experimenting before launch?
Certainly. This requires feedback from site owners, so an Origin Trial is probably the best way of doing this.

Any new strings?
Not currently, but we may require new strings for error messages.

Any implications for Google webservices (i.e. sync, translate)?
No.

Binary size?
Likely minimal.

Do the existing perf tests exercise all aspects of your new feature(s)? Unlikely, since this is an opt-in feature for websites.