Revert of Remove FORMAT_RGB from gfx::PngCodec

Revert of Remove FORMAT_RGB from gfx::PngCodec (patchset #3 id:40001 of https://codereview.chromium.org/2927893002/ )

Reason for revert:
Break the VDA unittest, see http://crbug.com/733522.

Original issue's description:
> Remove FORMAT_RGB from gfx::PngCodec
> 
> This is only used in test code.
> 
> BUG=724616
> CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.android:android_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel
> 
> Review-Url: https://codereview.chromium.org/2927893002
> Cr-Commit-Position: refs/heads/master@{#479124}
> Committed: https://chromium.googlesource.com/chromium/src/+/a9cbb594d5b28bdc51b7b505d201930221ddbe8a

TBR=msarett@chromium.org,scroggo@chromium.org,dcheng@chromium.org,sandersd@chromium.org,msarett@google.com
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=724616
Review-Url: https://codereview.chromium.org/2943433002
Cr-Commit-Position: refs/heads/master@{#479669}
Committed: https://chromium.googlesource.com/chromium/src/+/61479a854982e3749c4322a4c5dede07b713a163

[Owen Lin, 2017-06-15 07:16:54]

The CQ bit was checked by owenlin@chromium.org

[Owen Lin, 2017-06-15 07:16:55]

Created Revert of Remove FORMAT_RGB from gfx::PngCodec

[commit-bot: I haz the power, 2017-06-15 07:17:13]

CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-06-15 07:57:27]

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

[commit-bot: I haz the power, 2017-06-15 07:57:28]

Try jobs failed on following builders:
  win_chromium_x64_rel_ng on master.tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_x64_...)

[Owen Lin, 2017-06-15 11:00:12]

The CQ bit was checked by owenlin@chromium.org

[commit-bot: I haz the power, 2017-06-15 11:00:26]

CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-06-15 11:56:45]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1497524412147980, "parent_rev":
"5dc83b132397a2588addef6cc9787747f61a95f6", "commit_rev":
"f298e78a1cc39b92e258ca71ef3be95696c8cac5"}

[commit-bot: I haz the power, 2017-06-15 11:56:56]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1497524412147980, "parent_rev":
"5b822a3a8b57bfe9ab6addd7a4af898fb499a9e3", "commit_rev":
"61479a854982e3749c4322a4c5dede07b713a163"}

[commit-bot: I haz the power, 2017-06-15 11:57:12]

Description was changed from

==========
Revert of Remove FORMAT_RGB from gfx::PngCodec (patchset #3 id:40001 of
https://codereview.chromium.org/2927893002/ )

Reason for revert:
Break the VDA unittest, see http://crbug.com/733522.

Original issue's description:
> Remove FORMAT_RGB from gfx::PngCodec
> 
> This is only used in test code.
> 
> BUG=724616
>
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.android:android_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel
> 
> Review-Url: https://codereview.chromium.org/2927893002
> Cr-Commit-Position: refs/heads/master@{#479124}
> Committed:
https://chromium.googlesource.com/chromium/src/+/a9cbb594d5b28bdc51b7b505d201...

TBR=msarett@chromium.org,scroggo@chromium.org,dcheng@chromium.org,sandersd@ch...
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=724616
==========

to

==========
Revert of Remove FORMAT_RGB from gfx::PngCodec (patchset #3 id:40001 of
https://codereview.chromium.org/2927893002/ )

Reason for revert:
Break the VDA unittest, see http://crbug.com/733522.

Original issue's description:
> Remove FORMAT_RGB from gfx::PngCodec
> 
> This is only used in test code.
> 
> BUG=724616
>
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.android:android_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel
> 
> Review-Url: https://codereview.chromium.org/2927893002
> Cr-Commit-Position: refs/heads/master@{#479124}
> Committed:
https://chromium.googlesource.com/chromium/src/+/a9cbb594d5b28bdc51b7b505d201...

TBR=msarett@chromium.org,scroggo@chromium.org,dcheng@chromium.org,sandersd@ch...
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=724616

Review-Url: https://codereview.chromium.org/2943433002
Cr-Commit-Position: refs/heads/master@{#479669}
Committed:
https://chromium.googlesource.com/chromium/src/+/61479a854982e3749c4322a4c5de...
==========

[commit-bot: I haz the power, 2017-06-15 11:57:14]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/61479a854982e3749c4322a4c5de...