Supervised users: Add prefs for a secondary custodian, and for the custodian's profile image URL.

Supervised users: Add prefs for a secondary custodian, and for the custodian's profile image URL.

BUG=372381
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=288235

[Marc Treib, 2014-08-06 16:32:07]

Up for discussion: I added a second set of prefs. Alternatively, we could
replace the existing string prefs by lists, and add migration code.
Since we won't support more than two custodians for the foreseeable future, I
think this way is easiest.

[Bernhard Bauer, 2014-08-07 14:56:48]

LGTM

[Marc Treib, 2014-08-07 14:58:10]

The CQ bit was checked by treib@chromium.org

[commit-bot: I haz the power, 2014-08-07 14:59:38]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/treib@chromium.org/449543002/1

[commit-bot: I haz the power, 2014-08-07 18:03:04]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  win_chromium_rel on tryserver.chromium.win
(http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_rel/...)

[commit-bot: I haz the power, 2014-08-07 18:51:32]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-08-07 18:51:38]

Try jobs failed on following builders:
  win_chromium_rel on tryserver.chromium.win
(http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_rel/...)

[Marc Treib, 2014-08-08 00:19:24]

The CQ bit was checked by treib@chromium.org

[commit-bot: I haz the power, 2014-08-08 00:54:34]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/treib@chromium.org/449543002/1

[commit-bot: I haz the power, 2014-08-08 06:45:51]

Change committed as 288235