Revert of Switch SkDownSampleImageFilter over to new onFilterImage interface

Revert of Switch SkDownSampleImageFilter over to new onFilterImage interface (patchset #2 id:20001 of https://codereview.chromium.org/1851583002/ )

Reason for revert:
Some images are incorrect

Original issue's description:
> Switch SkDownSampleImageFilter over to new onFilterImage interface
> 
> This will slightly change the testimagefilters GM images
> 
> TBR=reed@google.com
> 
> BUG=skia:
> GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1851583002
> 
> Committed: https://skia.googlesource.com/skia/+/daa9da4937b6dfc9e1047239b4afd41b1c5474d5

TBR=senorblanco@chromium.org,reed@google.com,senorblanco@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Committed: https://skia.googlesource.com/skia/+/4eb4964e1802d6f222c47e9158636e1ae80bb4b7

[robertphillips, 2016-04-01 15:09:31]

Created Revert of Switch SkDownSampleImageFilter over to new onFilterImage
interface

[commit-bot: I haz the power, 2016-04-01 15:09:39]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1853823002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1853823002/1

[commit-bot: I haz the power, 2016-04-01 15:09:46]

Description was changed from

==========
Revert of Switch SkDownSampleImageFilter over to new onFilterImage interface
(patchset #2 id:20001 of https://codereview.chromium.org/1851583002/ )

Reason for revert:
Some images are incorrect

Original issue's description:
> Switch SkDownSampleImageFilter over to new onFilterImage interface
> 
> This will slightly change the testimagefilters GM images
> 
> TBR=reed@google.com
> 
> BUG=skia:
> GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
> 
> Committed:
https://skia.googlesource.com/skia/+/daa9da4937b6dfc9e1047239b4afd41b1c5474d5

TBR=senorblanco@chromium.org,reed@google.com,senorblanco@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:
==========

to

==========
Revert of Switch SkDownSampleImageFilter over to new onFilterImage interface
(patchset #2 id:20001 of https://codereview.chromium.org/1851583002/ )

Reason for revert:
Some images are incorrect

Original issue's description:
> Switch SkDownSampleImageFilter over to new onFilterImage interface
> 
> This will slightly change the testimagefilters GM images
> 
> TBR=reed@google.com
> 
> BUG=skia:
> GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
> 
> Committed:
https://skia.googlesource.com/skia/+/daa9da4937b6dfc9e1047239b4afd41b1c5474d5

TBR=senorblanco@chromium.org,reed@google.com,senorblanco@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Committed:
https://skia.googlesource.com/skia/+/4eb4964e1802d6f222c47e9158636e1ae80bb4b7
==========

[commit-bot: I haz the power, 2016-04-01 15:09:46]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/4eb4964e1802d6f222c47e9158636e1ae80bb4b7