Revert of Remove gpu-specialization of SkSpecialImage

Revert of Remove gpu-specialization of SkSpecialImage (patchset #5 id:80001 of https://codereview.chromium.org/1918993002/ )

Reason for revert:
N6 bot has gone red

Original issue's description:
> Remove gpu-specialization of SkSpecialImage
> 
> GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1918993002
> 
> Committed: https://skia.googlesource.com/skia/+/0533d6e4142c2787d6d3c325ef0d8d1962292cad

TBR=reed@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Committed: https://skia.googlesource.com/skia/+/ed086cae885050188cbb8761c0b1382bbadf088b

[robertphillips, 2016-04-26 22:02:05]

Created Revert of Remove gpu-specialization of SkSpecialImage

[commit-bot: I haz the power, 2016-04-26 22:02:18]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1921393003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1921393003/1

[commit-bot: I haz the power, 2016-04-26 22:02:27]

Description was changed from

==========
Revert of Remove gpu-specialization of SkSpecialImage (patchset #5 id:80001 of
https://codereview.chromium.org/1918993002/ )

Reason for revert:
N6 bot has gone red

Original issue's description:
> Remove gpu-specialization of SkSpecialImage
> 
> GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
> 
> Committed:
https://skia.googlesource.com/skia/+/0533d6e4142c2787d6d3c325ef0d8d1962292cad

TBR=reed@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
==========

to

==========
Revert of Remove gpu-specialization of SkSpecialImage (patchset #5 id:80001 of
https://codereview.chromium.org/1918993002/ )

Reason for revert:
N6 bot has gone red

Original issue's description:
> Remove gpu-specialization of SkSpecialImage
> 
> GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
> 
> Committed:
https://skia.googlesource.com/skia/+/0533d6e4142c2787d6d3c325ef0d8d1962292cad

TBR=reed@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Committed:
https://skia.googlesource.com/skia/+/ed086cae885050188cbb8761c0b1382bbadf088b
==========

[commit-bot: I haz the power, 2016-04-26 22:02:28]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/ed086cae885050188cbb8761c0b1382bbadf088b