Revert of YUV scale fix

Revert of YUV scale fix (patchset #2 id:20001 of https://codereview.chromium.org/922273002/)

Reason for revert:
Turning Windows compile bots red.

Original issue's description:
> YUV scale fix
> 
> There was a scaling mistake visible in some JPEG images because the ratio between Y, U and V planes were assumed to be the same ratios as the ratio between texture sizes, which was wrong because texture have a minimum size of 16 and are rounded up to the next POT. Since the ratios between Y and UV planes are generally 1, 2 or 4, rounding up to the next POT would generally preserve this ratio, so that this bug was not very visible, apart from very small jpeg images of 8 or less pixels in either width or height.
> 
> BUG=457954
> 
> Committed: https://skia.googlesource.com/skia/+/e6eddf7dd85add7da41f22f2643bdd573ad1f1cf

TBR=bsalomon@google.com,sugoi@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=457954
Committed: https://skia.googlesource.com/skia/+/0ff748ace6a53f05b52268f7a8786eeef611a839

[jvanverth1, 2015-02-13 20:02:02]

Created Revert of YUV scale fix

[commit-bot: I haz the power, 2015-02-13 20:02:16]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/926123002/1

[commit-bot: I haz the power, 2015-02-13 20:02:26]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/0ff748ace6a53f05b52268f7a8786eeef611a839