add GM to show bad banding in raster for radial gradients

add GM to show bad banding in raster for radial gradients

BUG=427508
TBR=

Committed: https://skia.googlesource.com/skia/+/3d9005c0286f2dff8f3db030c4c1ad19371deebd

[reed1, 2015-04-23 17:15:24]

reed@google.com changed reviewers:
+ robertphillips@google.com

[reed1, 2015-04-23 17:15:29]

The CQ bit was checked by reed@google.com to run a CQ dry run

[commit-bot: I haz the power, 2015-04-23 17:15:51]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1061753009/1

[reed1, 2015-04-23 17:24:29]

The CQ bit was checked by reed@google.com

[commit-bot: I haz the power, 2015-04-23 17:24:47]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1061753009/20001

[commit-bot: I haz the power, 2015-04-23 17:30:30]

Committed patchset #2 (id:20001) as
https://skia.googlesource.com/skia/+/3d9005c0286f2dff8f3db030c4c1ad19371deebd

[robertphillips, 2015-04-23 18:48:18]

lgtm + trivial nit

https://codereview.chromium.org/1061753009/diff/20001/gm/gradients.cpp
File gm/gradients.cpp (right):

https://codereview.chromium.org/1061753009/diff/20001/gm/gradients.cpp#newcod...
gm/gradients.cpp:450: fShader.reset(SkGradientShader::CreateRadial(center,
kRadius, gColors, NULL, 2,
missing space ?