Revert of Tag checkerboard bitmaps as sRGB

Revert of Tag checkerboard bitmaps as sRGB (patchset #1 id:1 of https://codereview.chromium.org/2368933003/ )

Reason for revert:
Regression on displacement GM when sRGB support is lacking.

Original issue's description:
> Tag checkerboard bitmaps as sRGB
> 
> Significantly reduces the diff between legacy and sRGB/F16 on about 25
> GMs. This is just the biggest piece of low-hanging fruit. Many GMs create
> N32 raster surfaces to procedurally generate source textures, and I'd like
> to fix all of them. It's much easier to reason about the GMs (is sRGB
> doing the right thing) when everything is tagged like this - the only
> expected differences are due to filtering and blending.
> 
> BUG=skia:
> GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2368933003
> 
> Committed: https://skia.googlesource.com/skia/+/fe843cea499ba163d53281425af210b1887d28e7

TBR=mtklein@google.com,reed@google.com,robertphillips@google.com
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=skia:

Committed: https://skia.googlesource.com/skia/+/b37eb0e968c5082e021244d4baf9b7721e3f360a

[Brian Osman, 2016-09-28 14:59:55]

The CQ bit was checked by brianosman@google.com

[Brian Osman, 2016-09-28 14:59:56]

Created Revert of Tag checkerboard bitmaps as sRGB

[commit-bot: I haz the power, 2016-09-28 14:59:58]

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, 2016-09-28 15:17:25]

Description was changed from

==========
Revert of Tag checkerboard bitmaps as sRGB (patchset #1 id:1 of
https://codereview.chromium.org/2368933003/ )

Reason for revert:
Regression on displacement GM when sRGB support is lacking.

Original issue's description:
> Tag checkerboard bitmaps as sRGB
> 
> Significantly reduces the diff between legacy and sRGB/F16 on about 25
> GMs. This is just the biggest piece of low-hanging fruit. Many GMs create
> N32 raster surfaces to procedurally generate source textures, and I'd like
> to fix all of them. It's much easier to reason about the GMs (is sRGB
> doing the right thing) when everything is tagged like this - the only
> expected differences are due to filtering and blending.
> 
> BUG=skia:
> GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2368933003
> 
> Committed:
https://skia.googlesource.com/skia/+/fe843cea499ba163d53281425af210b1887d28e7

TBR=mtklein@google.com,reed@google.com,robertphillips@google.com
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=skia:
==========

to

==========
Revert of Tag checkerboard bitmaps as sRGB (patchset #1 id:1 of
https://codereview.chromium.org/2368933003/ )

Reason for revert:
Regression on displacement GM when sRGB support is lacking.

Original issue's description:
> Tag checkerboard bitmaps as sRGB
> 
> Significantly reduces the diff between legacy and sRGB/F16 on about 25
> GMs. This is just the biggest piece of low-hanging fruit. Many GMs create
> N32 raster surfaces to procedurally generate source textures, and I'd like
> to fix all of them. It's much easier to reason about the GMs (is sRGB
> doing the right thing) when everything is tagged like this - the only
> expected differences are due to filtering and blending.
> 
> BUG=skia:
> GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2368933003
> 
> Committed:
https://skia.googlesource.com/skia/+/fe843cea499ba163d53281425af210b1887d28e7

TBR=mtklein@google.com,reed@google.com,robertphillips@google.com
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=skia:

Committed:
https://skia.googlesource.com/skia/+/b37eb0e968c5082e021244d4baf9b7721e3f360a
==========

[commit-bot: I haz the power, 2016-09-28 15:17:25]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/b37eb0e968c5082e021244d4baf9b7721e3f360a