Revert of [Payments] Update autofill/payments spacings

Revert of [Payments] Update autofill/payments spacings (patchset #1 id:1 of https://codereview.chromium.org/2130633004/ )

Reason for revert:
The ToT version of this patch breaks the Android Tests (dbg) bot, I've filed bug crbug.com/626606 for this issue and reverted that patch (see https://codereview.chromium.org/2137443002). I'm now reverting this patch as well to keep this branch consistent.

Original issue's description:
> [Payments] Update autofill/payments spacings
> 
> * The fields felt a little squished.  Try to space them out a little better.
> 
> * Update the underline colors to match the TextInputLayers.
> 
> * Add support for half width controls in the display.
> 
> Screenshots here:
> https://bugs.chromium.org/p/chromium/issues/detail?id=603635#c190
> 
> BUG=603635, 626451
> TBR=ianwen,rouslan
> 
> Review-Url: https://codereview.chromium.org/2114493002
> Cr-Commit-Position: refs/heads/master@{#404241}
> Committed: https://chromium.googlesource.com/chromium/src/+/ff2286219348812bd01cd9c87e58308399143c9a

TBR=ianwen@chromium.org,rouslan@chromium.org,dfalcantara@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=603635, 626451

[gsennton, 2016-07-08 10:17:20]

The CQ bit was checked by gsennton@chromium.org

[gsennton, 2016-07-08 10:17:21]

Created Revert of [Payments] Update autofill/payments spacings

[commit-bot: I haz the power, 2016-07-08 10:17:48]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-07-08 10:19:54]

Committed patchset #1 (id:1)