Revert of Enable sRGB on iOS, make sRGB decode support optional

Revert of Enable sRGB on iOS, make sRGB decode support optional (patchset #12 id:220001 of https://codereview.chromium.org/2539993002/ )

Reason for revert:
Command Buffer, too...

Original issue's description:
> Two (related) changes here:
> 
> 1) Our older iOS devices failed our sRGB tests, due to precision issues
> with alpha. At this point, we only test on iPadMini 4, and that appears
> not to have any problems.
> 
> 2) iOS devices still don't have the sRGB texture decode extension. But,
> some clients have no interest in mixing legacy/color-correct rendering,
> and would like to use sRGB on these devices. This GrContextOptions flag
> enables sRGB support in those cases.
> 
> Adjust the test code to produce sRGB capable contexts on these devices,
> but only for configs that have a color space. (See comment).
> 
> BUG=skia:4148
> 
> Committed: https://skia.googlesource.com/skia/+/9db12d2341f3f8722c8b90b11dd4cce138a8a64e
> Committed: https://skia.googlesource.com/skia/+/1aeb78c5d978b35b256525b711edd942bce01444

TBR=bsalomon@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:4148
Committed: https://skia.googlesource.com/skia/+/a6abb57b99ec273505dd7f0c72321c41f6e9a4ab

[Brian Osman, 2016-12-01 21:59:15]

The CQ bit was checked by brianosman@google.com

[Brian Osman, 2016-12-01 21:59:15]

Created Revert of Enable sRGB on iOS, make sRGB decode support optional

[commit-bot: I haz the power, 2016-12-01 21:59:24]

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, 2016-12-01 21:59:32]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1480629555501560, "parent_rev":
"271dabaeb246ffbad88c87072432a6670751c7a8", "commit_rev":
"a6abb57b99ec273505dd7f0c72321c41f6e9a4ab"}

[commit-bot: I haz the power, 2016-12-01 21:59:34]

Description was changed from

==========
Revert of Enable sRGB on iOS, make sRGB decode support optional (patchset #12
id:220001 of https://codereview.chromium.org/2539993002/ )

Reason for revert:
Command Buffer, too...

Original issue's description:
> Two (related) changes here:
> 
> 1) Our older iOS devices failed our sRGB tests, due to precision issues
> with alpha. At this point, we only test on iPadMini 4, and that appears
> not to have any problems.
> 
> 2) iOS devices still don't have the sRGB texture decode extension. But,
> some clients have no interest in mixing legacy/color-correct rendering,
> and would like to use sRGB on these devices. This GrContextOptions flag
> enables sRGB support in those cases.
> 
> Adjust the test code to produce sRGB capable contexts on these devices,
> but only for configs that have a color space. (See comment).
> 
> BUG=skia:4148
> 
> Committed:
https://skia.googlesource.com/skia/+/9db12d2341f3f8722c8b90b11dd4cce138a8a64e
> Committed:
https://skia.googlesource.com/skia/+/1aeb78c5d978b35b256525b711edd942bce01444

TBR=bsalomon@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:4148
==========

to

==========
Revert of Enable sRGB on iOS, make sRGB decode support optional (patchset #12
id:220001 of https://codereview.chromium.org/2539993002/ )

Reason for revert:
Command Buffer, too...

Original issue's description:
> Two (related) changes here:
> 
> 1) Our older iOS devices failed our sRGB tests, due to precision issues
> with alpha. At this point, we only test on iPadMini 4, and that appears
> not to have any problems.
> 
> 2) iOS devices still don't have the sRGB texture decode extension. But,
> some clients have no interest in mixing legacy/color-correct rendering,
> and would like to use sRGB on these devices. This GrContextOptions flag
> enables sRGB support in those cases.
> 
> Adjust the test code to produce sRGB capable contexts on these devices,
> but only for configs that have a color space. (See comment).
> 
> BUG=skia:4148
> 
> Committed:
https://skia.googlesource.com/skia/+/9db12d2341f3f8722c8b90b11dd4cce138a8a64e
> Committed:
https://skia.googlesource.com/skia/+/1aeb78c5d978b35b256525b711edd942bce01444

TBR=bsalomon@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:4148

Committed:
https://skia.googlesource.com/skia/+/a6abb57b99ec273505dd7f0c72321c41f6e9a4ab
==========

[commit-bot: I haz the power, 2016-12-01 21:59:35]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/a6abb57b99ec273505dd7f0c72321c41f6e9a4ab