Revert of Clear stencil buffer before using it for drawing

Revert of Clear stencil buffer before using it for drawing (patchset #2 id:20001 of https://codereview.chromium.org/2342873004/ )

Reason for revert:
performance regression in Android macrobench tests

Original issue's description:
> Clear stencil buffer before using it for drawing
> 
> Clear stencil buffer before using it for drawing. This is
> resolving an issue with a failing android CTS test in drawArc.
> GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2342873004
> 
> Committed: https://skia.googlesource.com/skia/+/c326a383e1069497884905f9dd3e720e17d8fcb5

TBR=bsalomon@google.com,reed@google.com
# Not skipping CQ checks because original CL landed more than 1 days ago.

Committed: https://skia.googlesource.com/skia/+/89e6af69b21fdcdb497d5f93c0a465634e18e055

[stani, 2016-09-20 18:56:10]

The CQ bit was checked by stani@google.com

[stani, 2016-09-20 18:56:10]

Created Revert of Clear stencil buffer before using it for drawing

[commit-bot: I haz the power, 2016-09-20 18:56:16]

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, 2016-09-20 20:24:50]

Description was changed from

==========
Revert of Clear stencil buffer before using it for drawing (patchset #2 id:20001
of https://codereview.chromium.org/2342873004/ )

Reason for revert:
performance regression in Android macrobench tests

Original issue's description:
> Clear stencil buffer before using it for drawing
> 
> Clear stencil buffer before using it for drawing. This is
> resolving an issue with a failing android CTS test in drawArc.
> GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2342873004
> 
> Committed:
https://skia.googlesource.com/skia/+/c326a383e1069497884905f9dd3e720e17d8fcb5

TBR=bsalomon@google.com,reed@google.com
# Not skipping CQ checks because original CL landed more than 1 days ago.
==========

to

==========
Revert of Clear stencil buffer before using it for drawing (patchset #2 id:20001
of https://codereview.chromium.org/2342873004/ )

Reason for revert:
performance regression in Android macrobench tests

Original issue's description:
> Clear stencil buffer before using it for drawing
> 
> Clear stencil buffer before using it for drawing. This is
> resolving an issue with a failing android CTS test in drawArc.
> GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2342873004
> 
> Committed:
https://skia.googlesource.com/skia/+/c326a383e1069497884905f9dd3e720e17d8fcb5

TBR=bsalomon@google.com,reed@google.com
# Not skipping CQ checks because original CL landed more than 1 days ago.

Committed:
https://skia.googlesource.com/skia/+/89e6af69b21fdcdb497d5f93c0a465634e18e055
==========

[commit-bot: I haz the power, 2016-09-20 20:24:51]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/89e6af69b21fdcdb497d5f93c0a465634e18e055