Use same vk non-overscroll solution for both login and lock screens

Use same vk non-overscroll solution for both login and lock screens

Depends on https://codereview.chromium.org/254673004/ which
introduces new layout manager for LockScreenContainer.

This means that lock screen UI now supports resizing when virtual
keyboard is shown and overscroll is disabled. Custom code for
lock screen that "scrolled" user pods into view is not needed anymore,
reusing login UI solution (http://crbug.com/363635).

This CL partially reverts https://codereview.chromium.org/304153004

To disable lock screen scroll into view use same --disable-login-scroll-into-view

BUG=375666
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=275800

[Nikita (slow), 2014-06-06 19:13:06]

PTAL

[dzhioev (left Google), 2014-06-09 08:22:41]

On 2014/06/06 19:13:06, Nikita Kostylev wrote:
> PTAL
LGTM

[Nikita (slow), 2014-06-09 08:29:45]

The CQ bit was checked by nkostylev@chromium.org

[commit-bot: I haz the power, 2014-06-09 08:29:55]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/nkostylev@chromium.org/320523003/40001

[commit-bot: I haz the power, 2014-06-09 10:13:50]

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...)
  win_chromium_compile_dbg on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/win_chromium_compile_...)

[commit-bot: I haz the power, 2014-06-09 11:37:08]

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

[commit-bot: I haz the power, 2014-06-09 11:37:09]

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

[Nikita (slow), 2014-06-09 11:38:33]

The CQ bit was checked by nkostylev@chromium.org

[commit-bot: I haz the power, 2014-06-09 11:38:47]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/nkostylev@chromium.org/320523003/40001

[commit-bot: I haz the power, 2014-06-09 12:57:21]

Change committed as 275800