Roll up to use >=4.

Roll up to use >=4.

    https://github.com/mtklein/libpng/commit/d0513638e7cc7d22b7dace879afea848b342fe33

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1854293002

Committed: https://skia.googlesource.com/skia/+/c19201f315d0fd91a6320c48ce18e5a87c4e8bda

[mtklein_C, 2016-04-04 20:31:34]

Description was changed from

==========
Roll up to use >=4.

   
https://github.com/mtklein/libpng/commit/d0513638e7cc7d22b7dace879afea848b342...

BUG=skia:
==========

to

==========
Roll up to use >=4.

   
https://github.com/mtklein/libpng/commit/d0513638e7cc7d22b7dace879afea848b342...

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

[mtklein_C, 2016-04-04 20:31:41]

The CQ bit was checked by mtklein@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-04-04 20:31:46]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1854293002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1854293002/1

[mtklein_C, 2016-04-04 20:31:57]

mtklein@chromium.org changed reviewers:
+ msarett@google.com

[msarett, 2016-04-04 20:33:19]

lgtm

[commit-bot: I haz the power, 2016-04-04 20:45:18]

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

[commit-bot: I haz the power, 2016-04-04 20:45:19]

Dry run: This issue passed the CQ dry run.

[mtklein, 2016-04-04 20:47:38]

The CQ bit was checked by mtklein@google.com

[commit-bot: I haz the power, 2016-04-04 20:47:46]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1854293002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1854293002/1

[commit-bot: I haz the power, 2016-04-04 20:48:44]

Description was changed from

==========
Roll up to use >=4.

   
https://github.com/mtklein/libpng/commit/d0513638e7cc7d22b7dace879afea848b342...

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

to

==========
Roll up to use >=4.

   
https://github.com/mtklein/libpng/commit/d0513638e7cc7d22b7dace879afea848b342...

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/+/c19201f315d0fd91a6320c48ce18e5a87c4e8bda
==========

[commit-bot: I haz the power, 2016-04-04 20:48:46]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/c19201f315d0fd91a6320c48ce18e5a87c4e8bda