Fix strings used by the desktop User Manager

Fix strings used by the desktop User Manager

The desktop user manager is moving to using "person" instead of "user"
for all the things.

BUG=287883
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=287158

[noms (inactive), 2014-07-31 17:02:45]

Ping! :)

[dzhioev (left Google), 2014-08-01 12:30:59]

On 2014/07/31 17:02:45, Monica Dinculescu wrote:
> Ping! :)

Sorry, I was sick all week. LGTM.

[noms (inactive), 2014-08-01 15:48:16]

The CQ bit was checked by noms@chromium.org

[commit-bot: I haz the power, 2014-08-01 15:50:50]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/noms@chromium.org/422063002/1

[commit-bot: I haz the power, 2014-08-01 21:49:27]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  win_chromium_x64_rel on tryserver.chromium.win
(http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_x64_...)

[commit-bot: I haz the power, 2014-08-02 05:54:33]

Change committed as 287158