Restrict alt data reduction proxy to Android dev channel

Restrict alt data reduction proxy to Android dev channel

The alternative data reduction proxy configuration is
only available in about:flags if the platform is Android
and the channel is Dev.

BUG=425602
Committed: https://crrev.com/470a859043b84f1cc3a7159acf936be67c9c2cdf
Cr-Commit-Position: refs/heads/master@{#301005}

[bengr, 2014-10-23 20:27:54]

bengr@chromium.org changed reviewers:
+ thestig@chromium.org

[bengr, 2014-10-23 20:27:54]

thestig: PTAL.

[Lei Zhang, 2014-10-23 21:02:59]

lgtm

[bengr, 2014-10-23 21:50:11]

The CQ bit was checked by bengr@chromium.org

[bengr, 2014-10-23 21:50:13]

The CQ bit was unchecked by bengr@chromium.org

[bengr, 2014-10-23 23:13:54]

The CQ bit was checked by bengr@chromium.org

[commit-bot: I haz the power, 2014-10-23 23:15:40]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/648213003/1

[commit-bot: I haz the power, 2014-10-24 00:32:02]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-10-24 00:32:36]

Patchset 1 (id:??) landed as
https://crrev.com/470a859043b84f1cc3a7159acf936be67c9c2cdf
Cr-Commit-Position: refs/heads/master@{#301005}