Revert of Changes NineImagePainter to snap to (enclosed) pixel boundaries

Revert of Changes NineImagePainter to snap to (enclosed) pixel boundaries (patchset #2 id:20001 of https://codereview.chromium.org/604463003/)

Reason for revert:
I'm reverting this as there are two issues:
1. Translate isn't being set correctly.
2. Even with 1 fixed there are problems with scrollbars. I'll investigate after the revert.

Original issue's description:
> Changes NineImagePainter to snap to (enclosed) pixel boundaries
>
> Otherwise the sides may be clipped out.
>
> BUG=417493
> TEST=see bug
> R=ananta@chromium.org
>
> Committed: https://crrev.com/d1ab0241ee29c70bd08531d1f038964664b124b6
> Cr-Commit-Position: refs/heads/master@{#296608}

TBR=ananta@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=417493
Committed: https://crrev.com/70d0d490c16f1eda44e3d06cc54aad9911b03cc1
Cr-Commit-Position: refs/heads/master@{#296839}

[sky, 2014-09-26 00:08:12]

Created Revert of Changes NineImagePainter to snap to (enclosed) pixel
boundaries

[commit-bot: I haz the power, 2014-09-26 00:11:05]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/605893002/1

[commit-bot: I haz the power, 2014-09-26 00:12:29]

Committed patchset #1 (id:1) as 0cdd6daff3d53ab6dc5976c43723df65628acd4f

[commit-bot: I haz the power, 2014-09-26 00:13:10]

Patchset 1 (id:??) landed as
https://crrev.com/70d0d490c16f1eda44e3d06cc54aad9911b03cc1
Cr-Commit-Position: refs/heads/master@{#296839}