Revert AlphaThresholdFilter to its old behavior wrt premul

Revert AlphaThresholdFilter to its old behavior wrt premul

TBR=borenet@google.com

This fixes the "serialize-8888 gm  imagealphathreshold_surface" failure related to:
https://codereview.chromium.org/1879643003/ (Switch AlphaThresholdFilter over to new onFilterImage interface)

GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1885633003

Committed: https://skia.googlesource.com/skia/+/247e5341a483053862213f1bdda4ce5c47544b8f

[robertphillips, 2016-04-12 19:17:29]

Description was changed from

==========
Revert AlphaThresholdFilter to its old behavior wrt premul
==========

to

==========
Revert AlphaThresholdFilter to its old behavior wrt premul
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
==========

[robertphillips, 2016-04-12 19:23:56]

Description was changed from

==========
Revert AlphaThresholdFilter to its old behavior wrt premul
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
==========

to

==========
Revert AlphaThresholdFilter to its old behavior wrt premul

TBR=borenet@google.com

This fixes the "serialize-8888 gm  imagealphathreshold_surface" failure related
to:
https://codereview.chromium.org/1879643003/ (Switch AlphaThresholdFilter over to
new onFilterImage interface)

GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
==========

[robertphillips, 2016-04-12 19:23:56]

robertphillips@google.com changed reviewers:
+ borenet@google.com, senorblanco@chromium.org, senorblanco@google.com

[robertphillips, 2016-04-12 19:24:13]

The CQ bit was checked by robertphillips@google.com to run a CQ dry run

[commit-bot: I haz the power, 2016-04-12 19:24:24]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1885633003/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1885633003/20001

[Stephen White, 2016-04-12 19:25:03]

LGTM

[commit-bot: I haz the power, 2016-04-12 19:34:17]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-04-12 19:34:18]

Dry run: This issue passed the CQ dry run.

[robertphillips, 2016-04-12 19:38:24]

The CQ bit was checked by robertphillips@google.com

[commit-bot: I haz the power, 2016-04-12 19:38:26]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1885633003/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1885633003/20001

[commit-bot: I haz the power, 2016-04-12 19:39:28]

Description was changed from

==========
Revert AlphaThresholdFilter to its old behavior wrt premul

TBR=borenet@google.com

This fixes the "serialize-8888 gm  imagealphathreshold_surface" failure related
to:
https://codereview.chromium.org/1879643003/ (Switch AlphaThresholdFilter over to
new onFilterImage interface)

GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
==========

to

==========
Revert AlphaThresholdFilter to its old behavior wrt premul

TBR=borenet@google.com

This fixes the "serialize-8888 gm  imagealphathreshold_surface" failure related
to:
https://codereview.chromium.org/1879643003/ (Switch AlphaThresholdFilter over to
new onFilterImage interface)

GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...

Committed:
https://skia.googlesource.com/skia/+/247e5341a483053862213f1bdda4ce5c47544b8f
==========

[commit-bot: I haz the power, 2016-04-12 19:39:28]

Committed patchset #2 (id:20001) as
https://skia.googlesource.com/skia/+/247e5341a483053862213f1bdda4ce5c47544b8f