Desktop user manager: Fix spacing between deletion warning text and button for supervised users.

Desktop user manager: Fix spacing between deletion warning text and button for supervised users.

This fixes an oversight from https://codereview.chromium.org/307483002.

"Before" screenshot: https://drive.google.com/a/google.com/file/d/0BxTU2YPRG-lRNl9FRy1KQ2c2dEU/view?usp=sharing
Mock: https://folio.googleplex.com/chrome-ux/mocks/064-chrome-away-from-chrome/supervised-users/mirror#%2FPlaypen_210514_mirror-11.png

BUG=310640
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=287828

[Marc Treib, 2014-08-06 12:15:23]

Hi Tatiana, PTAL!

[merkulova, 2014-08-06 12:27:11]

lgtm, you need someone else as an owner

[Marc Treib, 2014-08-06 12:30:24]

On 2014/08/06 12:27:11, merkulova wrote:
> lgtm, you need someone else as an owner

Turns out I don't! ;-)

[Marc Treib, 2014-08-06 12:30:28]

The CQ bit was checked by treib@chromium.org

[commit-bot: I haz the power, 2014-08-06 12:31:41]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/treib@chromium.org/443033003/1

[commit-bot: I haz the power, 2014-08-06 16:17:37]

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, 2014-08-06 19:34:47]

Change committed as 287828