Revert of Fix caching of sample locations

Revert of Fix caching of sample locations (patchset #3 id:40001 of https://codereview.chromium.org/2111423002/ )

Reason for revert:
Seems to be causing Chromium roll failures:
* https://codereview.chromium.org/2120373003
* https://codereview.chromium.org/2117193002
* https://codereview.chromium.org/2124653002

Original issue's description:
> Fix caching of sample locations
> 
> The original caching logic for sample locations wishfully assumed that
> the GPU would always use the same sample pattern for render targets
> that had the same number of samples. It turns out we can't rely on
> that. This change improves the caching logic to handle mismatched
> simple patterns with the same count, and adds a unit test that
> emulates different sample patterns observed on real hardware.
> 
> BUG=skia:
> GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2111423002
> 
> Committed: https://skia.googlesource.com/skia/+/09d49a3bfe2d1e652a648ce1ea0962b38d10d166

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

Committed: https://skia.googlesource.com/skia/+/42e6798696ac3a93a2b7ba7a9d6a84b77eba0116

[rmistry, 2016-07-05 00:44:50]

The CQ bit was checked by rmistry@google.com

[rmistry, 2016-07-05 00:44:50]

Created Revert of Fix caching of sample locations

[commit-bot: I haz the power, 2016-07-05 00:45:00]

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, 2016-07-05 00:45:10]

Description was changed from

==========
Revert of Fix caching of sample locations (patchset #3 id:40001 of
https://codereview.chromium.org/2111423002/ )

Reason for revert:
Seems to be causing Chromium roll failures:
* https://codereview.chromium.org/2120373003
* https://codereview.chromium.org/2117193002
* https://codereview.chromium.org/2124653002

Original issue's description:
> Fix caching of sample locations
> 
> The original caching logic for sample locations wishfully assumed that
> the GPU would always use the same sample pattern for render targets
> that had the same number of samples. It turns out we can't rely on
> that. This change improves the caching logic to handle mismatched
> simple patterns with the same count, and adds a unit test that
> emulates different sample patterns observed on real hardware.
> 
> BUG=skia:
> GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2111423002
> 
> Committed:
https://skia.googlesource.com/skia/+/09d49a3bfe2d1e652a648ce1ea0962b38d10d166

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

to

==========
Revert of Fix caching of sample locations (patchset #3 id:40001 of
https://codereview.chromium.org/2111423002/ )

Reason for revert:
Seems to be causing Chromium roll failures:
* https://codereview.chromium.org/2120373003
* https://codereview.chromium.org/2117193002
* https://codereview.chromium.org/2124653002

Original issue's description:
> Fix caching of sample locations
> 
> The original caching logic for sample locations wishfully assumed that
> the GPU would always use the same sample pattern for render targets
> that had the same number of samples. It turns out we can't rely on
> that. This change improves the caching logic to handle mismatched
> simple patterns with the same count, and adds a unit test that
> emulates different sample patterns observed on real hardware.
> 
> BUG=skia:
> GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2111423002
> 
> Committed:
https://skia.googlesource.com/skia/+/09d49a3bfe2d1e652a648ce1ea0962b38d10d166

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

Committed:
https://skia.googlesource.com/skia/+/42e6798696ac3a93a2b7ba7a9d6a84b77eba0116
==========

[commit-bot: I haz the power, 2016-07-05 00:45:11]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/42e6798696ac3a93a2b7ba7a9d6a84b77eba0116

[commit-bot: I haz the power, 2016-07-05 00:45:12]

CQ bit was unchecked.