Add appendPrecisionModifier method to GrGLSLShaderBuilder

Add appendPrecisionModifier method to GrGLSLShaderBuilder

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1881513002

Committed: https://skia.googlesource.com/skia/+/1f50acff0dc09e50cc207846508d8e6459334b2a

[Chris Dalton, 2016-04-11 16:44:03]

Description was changed from

==========
Add appendPrecisionModifier method to GrGLSLShaderBuilder

BUG=skia:
==========

to

==========
Add appendPrecisionModifier method to GrGLSLShaderBuilder

BUG=skia:
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
==========

[Chris Dalton, 2016-04-11 16:57:26]

What do you think? It's a bit bikeshed-y but I think it helps clean things up
for my instanced stuff.

[Chris Dalton, 2016-04-11 16:57:45]

cdalton@nvidia.com changed reviewers:
+ bsalomon@google.com, egdaniel@google.com

[bsalomon, 2016-04-11 18:15:53]

lgtm

[Chris Dalton, 2016-04-11 18:18:04]

The CQ bit was checked by cdalton@nvidia.com

[commit-bot: I haz the power, 2016-04-11 18:18:16]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1881513002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1881513002/1

[commit-bot: I haz the power, 2016-04-11 18:30:53]

Description was changed from

==========
Add appendPrecisionModifier method to GrGLSLShaderBuilder

BUG=skia:
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
==========

to

==========
Add appendPrecisionModifier method to GrGLSLShaderBuilder

BUG=skia:
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...

Committed:
https://skia.googlesource.com/skia/+/1f50acff0dc09e50cc207846508d8e6459334b2a
==========

[commit-bot: I haz the power, 2016-04-11 18:30:54]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/1f50acff0dc09e50cc207846508d8e6459334b2a