Fix possible divide by zero in vulkan granularity adjustments

Fix possible divide by zero in vulkan granularity adjustments

This should fix the divide by zero crash on the nexus player bots

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2358613002

Committed: https://skia.googlesource.com/skia/+/d5797b3059a4037a6dce4c0a66693ba471b1588e

[egdaniel, 2016-09-20 15:56:48]

Description was changed from

==========
Fix possible divide by zero in vulkan granularity adjustments

This should fix the divide by zero crash on the nexus player bots

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

to

==========
Fix possible divide by zero in vulkan granularity adjustments

This should fix the divide by zero crash on the nexus player bots

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2358613002
==========

[egdaniel, 2016-09-20 16:03:55]

egdaniel@google.com changed reviewers:
+ ethannicholas@google.com, mtklein@google.com

[ethannicholas, 2016-09-20 19:10:02]

lgtm

[egdaniel, 2016-09-20 19:24:25]

The CQ bit was checked by egdaniel@google.com

[commit-bot: I haz the power, 2016-09-20 19:24:39]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-09-20 19:24:39]

This CL has an open dependency (Issue 2355883002 Patch 1). Please resolve the
dependency and try again.
If you are sure that there is no real dependency, please use one of the options
listed in https://goo.gl/9Es4OR to land the CL.

[egdaniel, 2016-09-20 19:27:04]

The CQ bit was checked by egdaniel@google.com

[egdaniel, 2016-09-20 19:27:04]

The patchset sent to the CQ was uploaded after l-g-t-m from
ethannicholas@google.com
Link to the patchset: https://codereview.chromium.org/2358613002/#ps20001
(title: "rebase")

[commit-bot: I haz the power, 2016-09-20 19:27:16]

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 19:57:47]

Description was changed from

==========
Fix possible divide by zero in vulkan granularity adjustments

This should fix the divide by zero crash on the nexus player bots

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2358613002
==========

to

==========
Fix possible divide by zero in vulkan granularity adjustments

This should fix the divide by zero crash on the nexus player bots

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2358613002

Committed:
https://skia.googlesource.com/skia/+/d5797b3059a4037a6dce4c0a66693ba471b1588e
==========

[commit-bot: I haz the power, 2016-09-20 19:57:48]

Committed patchset #2 (id:20001) as
https://skia.googlesource.com/skia/+/d5797b3059a4037a6dce4c0a66693ba471b1588e