Referrer Policy: Introduce "Origin When Cross-Origin". [1/3]

Referrer Policy: Introduce "Origin When Cross-Origin". [1/3]

As specified at [1], this patch adds the initial Blink-side of the new
referrer policy. The Chromium side is mostly being taken care of in [2].
Tests will come once the Chromium side supports the new enum value and
doesn't clear the header on redirect.

[1/3]: This patch.
[2/3]: Chromium - https://codereview.chromium.org/747043002/
[3/3]: Blink - https://codereview.chromium.org/747903003

[1]: https://w3c.github.io/webappsec/specs/referrer-policy/#origin-when-cross-origin
[2]: https://codereview.chromium.org/714813003/

BUG=309551
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=185807

[Mike West, 2014-11-21 14:31:28]

mkwst@chromium.org changed reviewers:
+ jochen@chromium.org

[Mike West, 2014-11-21 14:31:28]

WDYT, Jochen?

I need to wire it up to the right referrer policy on the Chromium side before
landing tests. Two more CLs to follow.

[jochen (gone - plz use gerrit), 2014-11-21 14:34:05]

would it make sense to add a unit test for the SecurityPolicy change?

[Mike West, 2014-11-21 14:35:58]

Almost certainly! I'll run this by you again once I finish poking at
browser_tests for the chromium-side change.

[Mike West, 2014-11-21 15:17:41]

Added a test. Mind taking another look?

[jochen (gone - plz use gerrit), 2014-11-21 16:25:37]

lgtm

[Mike West, 2014-11-21 16:28:11]

The CQ bit was checked by mkwst@chromium.org

[commit-bot: I haz the power, 2014-11-21 16:29:20]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/736233004/20001

[commit-bot: I haz the power, 2014-11-21 17:23:06]

Committed patchset #2 (id:20001) as
https://src.chromium.org/viewvc/blink?view=rev&revision=185807