Referrer Policy: Distinguish "default" from "no referrer when downgrade". [1/2]

Referrer Policy: Distinguish "default" from "no referrer when downgrade".

To add a value to the WebReferrerPolicy enum, we'll need to allow
'default' in this switch.

[1/2] Chromium: This patch.
[2/2] Blink: https://codereview.chromium.org/698973008/

BUG=431694
Committed: https://crrev.com/6028e7514b4c357443267d6975f7eee49ad746f0
Cr-Commit-Position: refs/heads/master@{#303462}

[Mike West, 2014-11-10 12:13:03]

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

[Mike West, 2014-11-10 12:13:17]

If you happen to not be OOO any time soon, mind taking a look?

[jochen (gone - plz use gerrit), 2014-11-10 13:39:58]

lgtm

[Mike West, 2014-11-10 13:48:31]

The CQ bit was checked by mkwst@chromium.org

[commit-bot: I haz the power, 2014-11-10 13:49:15]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/717503002/1

[commit-bot: I haz the power, 2014-11-10 14:35:16]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-11-10 14:36:03]

Patchset 1 (id:??) landed as
https://crrev.com/6028e7514b4c357443267d6975f7eee49ad746f0
Cr-Commit-Position: refs/heads/master@{#303462}