Enable content_capabilities on dev channel

Enable content_capabilities on dev channel

BUG=463769
R=kalman@chromium.org

Committed: https://crrev.com/1e6cad3682e5a5f023a7702540ae7f2a151dd61a
Cr-Commit-Position: refs/heads/master@{#319095}

[not at google - send to devlin, 2015-03-04 17:37:45]

lgtm but consider canary only.

https://codereview.chromium.org/976983003/diff/1/extensions/common/api/_manif...
File extensions/common/api/_manifest_features.json (right):

https://codereview.chromium.org/976983003/diff/1/extensions/common/api/_manif...
extensions/common/api/_manifest_features.json:96: "channel": "dev",
You could also enable on canary only, if this is just for the purpose of
testing?

[Ken Rockot(use gerrit already), 2015-03-04 17:46:35]

Canary it is. Thanks

[Ken Rockot(use gerrit already), 2015-03-04 17:46:38]

The CQ bit was checked by rockot@chromium.org

[Ken Rockot(use gerrit already), 2015-03-04 17:46:39]

The patchset sent to the CQ was uploaded after l-g-t-m from kalman@chromium.org
Link to the patchset: https://codereview.chromium.org/976983003/#ps20001 (title:
"dev -> canary")

[commit-bot: I haz the power, 2015-03-04 17:47:13]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/976983003/20001

[commit-bot: I haz the power, 2015-03-04 19:09:37]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-03-04 19:10:16]

Patchset 2 (id:??) landed as
https://crrev.com/1e6cad3682e5a5f023a7702540ae7f2a151dd61a
Cr-Commit-Position: refs/heads/master@{#319095}