Revert of Re-proc SkBlitRow::Color32 for ARM.

Revert of Re-proc SkBlitRow::Color32 for ARM. (patchset #3 id:40001 of https://codereview.chromium.org/1145283003/)

Reason for revert:
http://build.chromium.org/p/tryserver.chromium.mac/builders/ios_rel_device_ninja/builds/70016/steps/compile%20%28with%20patch%29/logs/stdio

Original issue's description:
> Re-proc SkBlitRow::Color32 for ARM.
> 
> This is a spiritual revert of http://crrev.com/1104183004.
> 
> BUG=skia:
> 
> Committed: https://skia.googlesource.com/skia/+/4e13a23d8f720e17660f26657b45b89fe4339004

TBR=reed@google.com,mtklein@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Committed: https://skia.googlesource.com/skia/+/3b8d9f776e476746b38c0dca674e497d7c4b13cb

[mtklein, 2015-05-22 12:51:13]

Created Revert of Re-proc SkBlitRow::Color32 for ARM.

[commit-bot: I haz the power, 2015-05-22 12:51:32]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1157633003/1

[commit-bot: I haz the power, 2015-05-22 12:51:43]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/3b8d9f776e476746b38c0dca674e497d7c4b13cb