Revert of Check if internal_format is valid for GenerateMipmap().

Revert of Check if internal_format is valid for GenerateMipmap(). (patchset #2 id:20001 of https://codereview.chromium.org/1605323004/ )

Reason for revert:
Broke the following webkit_tests on all platforms:
virtual/gpu/fast/canvas/canvas-imageSmoothingQuality.html
virtual/gpu/fast/canvas/canvas-imageSmoothingQuality-pixel.html

Original issue's description:
> Check if internal_format is valid for GenerateMipmap().
>
> BUG=429053
> TEST=gpu_unittests,webgl2_conformance
> R=piman@chromium.org
>
> Committed: https://crrev.com/33040da405658793aa7b248e8ea6e292fad46193
> Cr-Commit-Position: refs/heads/master@{#370562}

TBR=piman@chromium.org,zmo@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=429053
Committed: https://crrev.com/2b96134dc68c4f207285991476e6c4b96bd07663
Cr-Commit-Position: refs/heads/master@{#370614}

[alancutter (OOO until 2018), 2016-01-21 04:04:40]

Created Revert of Check if internal_format is valid for GenerateMipmap().

[commit-bot: I haz the power, 2016-01-21 04:05:47]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1619453002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1619453002/1

[commit-bot: I haz the power, 2016-01-21 04:07:29]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-01-21 04:09:23]

Description was changed from

==========
Revert of Check if internal_format is valid for GenerateMipmap(). (patchset #2
id:20001 of https://codereview.chromium.org/1605323004/ )

Reason for revert:
Broke the following webkit_tests on all platforms:
virtual/gpu/fast/canvas/canvas-imageSmoothingQuality.html
virtual/gpu/fast/canvas/canvas-imageSmoothingQuality-pixel.html

Original issue's description:
> Check if internal_format is valid for GenerateMipmap().
> 
> BUG=429053
> TEST=gpu_unittests,webgl2_conformance
> R=piman@chromium.org
> 
> Committed: https://crrev.com/33040da405658793aa7b248e8ea6e292fad46193
> Cr-Commit-Position: refs/heads/master@{#370562}

TBR=piman@chromium.org,zmo@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=429053
==========

to

==========
Revert of Check if internal_format is valid for GenerateMipmap(). (patchset #2
id:20001 of https://codereview.chromium.org/1605323004/ )

Reason for revert:
Broke the following webkit_tests on all platforms:
virtual/gpu/fast/canvas/canvas-imageSmoothingQuality.html
virtual/gpu/fast/canvas/canvas-imageSmoothingQuality-pixel.html

Original issue's description:
> Check if internal_format is valid for GenerateMipmap().
>
> BUG=429053
> TEST=gpu_unittests,webgl2_conformance
> R=piman@chromium.org
>
> Committed: https://crrev.com/33040da405658793aa7b248e8ea6e292fad46193
> Cr-Commit-Position: refs/heads/master@{#370562}

TBR=piman@chromium.org,zmo@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=429053

Committed: https://crrev.com/2b96134dc68c4f207285991476e6c4b96bd07663
Cr-Commit-Position: refs/heads/master@{#370614}
==========

[commit-bot: I haz the power, 2016-01-21 04:09:23]

Patchset 1 (id:??) landed as
https://crrev.com/2b96134dc68c4f207285991476e6c4b96bd07663
Cr-Commit-Position: refs/heads/master@{#370614}