Referrer Policy: Introduce "Origin When Cross-Origin" [2/3]
As specified at [1], this patch wires the Blink-side of the referrer
policy to the proper policy in the network stack.
[1/3]: Blink - https://codereview.chromium.org/
736233004/
[2/3]: This patch.
[3/3]: Blink - https://codereview.chromium.org/
747903003
[1]: https://w3c.github.io/webappsec/specs/referrer-policy/#origin-when-cross-origin
BUG=309551
Review URL: https://codereview.chromium.org/
747043002
Cr-Commit-Position: refs/heads/master@{#305370}