Enable low end device mode when the client is assigned to one of

Enable low end device mode when a ChromeOS device is assigned to one of
MemoryReduction Finch experiment EnabledXXX groups.

BUG=482831
Committed: https://crrev.com/d4270e8c0c015865ea36a182f75bdce168453743
Cr-Commit-Position: refs/heads/master@{#328492}

[Chi-Ngai Wan, 2015-05-06 02:53:53]

cnwan@chromium.org changed reviewers:
+ bccheng@chromium.org, mark@chromium.org

[Chi-Ngai Wan, 2015-05-06 02:54:55]

cnwan@chromium.org changed required reviewers:
+ mark@chromium.org

[Chi-Ngai Wan, 2015-05-06 03:03:42]

cnwan@chromium.org changed reviewers:
+ laszio@chromium.org

[Mark Mentovai, 2015-05-06 04:23:13]

LGTM

[Chi-Ngai Wan, 2015-05-06 05:22:22]

The CQ bit was checked by cnwan@chromium.org

[commit-bot: I haz the power, 2015-05-06 05:22:38]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1117193004/1

[commit-bot: I haz the power, 2015-05-06 06:11:58]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-05-06 06:12:44]

Patchset 1 (id:??) landed as
https://crrev.com/d4270e8c0c015865ea36a182f75bdce168453743
Cr-Commit-Position: refs/heads/master@{#328492}