Gaia loading screen changed to align with new Sync screen UI

Gaia loading screen changed to align with new Sync screen UI
Based on https://codereview.chromium.org/1040143002/

BUG=470114
Committed: https://crrev.com/c4d260fa056a03e61d452eea43ee35714f187729
Cr-Commit-Position: refs/heads/master@{#323918}

[Nikita (slow), 2015-04-06 17:07:34]

nkostylev@chromium.org changed reviewers:
+ dzhioev@chromium.org

[Nikita (slow), 2015-04-06 17:08:04]

The CQ bit was checked by nkostylev@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2015-04-06 17:08:10]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1064663002/20001

[commit-bot: I haz the power, 2015-04-06 17:17:08]

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

[commit-bot: I haz the power, 2015-04-06 17:17:09]

Try jobs failed on following builders:
  chromium_presubmit on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/chromium_presub...)

[dzhioev (left Google), 2015-04-06 17:54:06]

On 2015/04/06 17:17:09, I haz the power (commit-bot) wrote:
> Try jobs failed on following builders:
>   chromium_presubmit on tryserver.chromium.linux (JOB_FAILED,
>
http://build.chromium.org/p/tryserver.chromium.linux/builders/chromium_presub...)

LGTM

[Nikita (slow), 2015-04-06 17:56:49]

The CQ bit was checked by nkostylev@chromium.org

[commit-bot: I haz the power, 2015-04-06 17:57:19]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1064663002/20001

[commit-bot: I haz the power, 2015-04-06 18:30:27]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-04-06 18:36:46]

Patchset 2 (id:??) landed as
https://crrev.com/c4d260fa056a03e61d452eea43ee35714f187729
Cr-Commit-Position: refs/heads/master@{#323918}