GN: add skia_use_mesa for OSMesa in tools.

GN: add skia_use_mesa for OSMesa in tools.

I tested by running
  $ out/dm --src gm --config mesa
  $ out/nanobench --config mesa --match Xfermode
... but I ran out of patience waiting for nanobench to finish.  Probably works.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2357703002

Committed: https://skia.googlesource.com/skia/+/a627b5c3b9004118621bfa99f3952465adfa4ad6

[mtklein_C, 2016-09-20 19:30:16]

Description was changed from

==========
GN: add skia_use_mesa for OSMesa in tools.

I tested by running
  $ out/dm --src gm --config mesa
  $ out/nanobench --config mesa --match Xfermode

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

to

==========
GN: add skia_use_mesa for OSMesa in tools.

I tested by running
  $ out/dm --src gm --config mesa
  $ out/nanobench --config mesa --match Xfermode

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2357703002
==========

[mtklein_C, 2016-09-20 19:30:40]

Description was changed from

==========
GN: add skia_use_mesa for OSMesa in tools.

I tested by running
  $ out/dm --src gm --config mesa
  $ out/nanobench --config mesa --match Xfermode

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2357703002
==========

to

==========
GN: add skia_use_mesa for OSMesa in tools.

I tested by running
  $ out/dm --src gm --config mesa
  $ out/nanobench --config mesa --match Xfermode
... but I ran out of patience waiting for nanobench to finish.  Probably works.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2357703002
==========

[mtklein_C, 2016-09-20 19:33:39]

mtklein@chromium.org changed reviewers:
+ bsalomon@google.com

[bsalomon, 2016-09-20 19:35:00]

lgtm

[mtklein_C, 2016-09-20 19:49:46]

The CQ bit was checked by mtklein@chromium.org

[commit-bot: I haz the power, 2016-09-20 19:49:51]

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 20:36:48]

Description was changed from

==========
GN: add skia_use_mesa for OSMesa in tools.

I tested by running
  $ out/dm --src gm --config mesa
  $ out/nanobench --config mesa --match Xfermode
... but I ran out of patience waiting for nanobench to finish.  Probably works.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2357703002
==========

to

==========
GN: add skia_use_mesa for OSMesa in tools.

I tested by running
  $ out/dm --src gm --config mesa
  $ out/nanobench --config mesa --match Xfermode
... but I ran out of patience waiting for nanobench to finish.  Probably works.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2357703002

Committed:
https://skia.googlesource.com/skia/+/a627b5c3b9004118621bfa99f3952465adfa4ad6
==========

[commit-bot: I haz the power, 2016-09-20 20:36:49]

Committed patchset #2 (id:20001) as
https://skia.googlesource.com/skia/+/a627b5c3b9004118621bfa99f3952465adfa4ad6