Print preview changes for App Kiosk mode.

In App Kiosk mode, Print Preview changes:
- do not show user sign in promo
- do not show cloud print dialog link
- do not send COOKIES-based cloud printer search requests
- do not add Save as PDF printer
Related changes:
- fix UI issues when no printer is selected
- fix destination list sizing when one of the sections is empty

BUG=370096
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=282800

[Vitaly Buka (NO REVIEWS), 2014-07-11 21:05:21]

lgtm

[Aleksey Shlyapnikov, 2014-07-11 21:13:56]

The CQ bit was checked by alekseys@chromium.org

[commit-bot: I haz the power, 2014-07-11 21:16:02]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/alekseys@chromium.org/387073002/1

[Aleksey Shlyapnikov, 2014-07-11 23:29:26]

The CQ bit was checked by alekseys@chromium.org

[commit-bot: I haz the power, 2014-07-11 23:30:17]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/alekseys@chromium.org/387073002/20001

[commit-bot: I haz the power, 2014-07-12 03:10:41]

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

[commit-bot: I haz the power, 2014-07-12 04:57:06]

Change committed as 282800