Fix vulkan layer callback bug

Fix vulkan layer callback bug

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1870673002

Committed: https://skia.googlesource.com/skia/+/ef0c10cffefef90646ff2e238d7c2d82247a0370

[egdaniel, 2016-04-07 14:37:40]

Description was changed from

==========
Fix vulkan layer callback bug

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

to

==========
Fix vulkan layer callback bug

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

[egdaniel, 2016-04-07 14:38:40]

egdaniel@google.com changed reviewers:
+ jvanverth@google.com

[egdaniel, 2016-04-07 14:38:43]

The CQ bit was checked by egdaniel@google.com

[commit-bot: I haz the power, 2016-04-07 14:38:50]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1870673002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1870673002/1

[commit-bot: I haz the power, 2016-04-07 14:38:51]

Note for Reviewers:
The CQ is waiting for an approval.
If you believe that the CL is not ready yet, or if you would like to L-G-T-M
with comments then please uncheck the CQ checkbox.

Waiting for LGTM from valid reviewer(s) till 2016-04-07 20:38 UTC

[jvanverth1, 2016-04-07 14:44:36]

lgtm

[commit-bot: I haz the power, 2016-04-07 14:51:25]

Description was changed from

==========
Fix vulkan layer callback bug

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

to

==========
Fix vulkan layer callback bug

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/+/ef0c10cffefef90646ff2e238d7c2d82247a0370
==========

[commit-bot: I haz the power, 2016-04-07 14:51:25]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/ef0c10cffefef90646ff2e238d7c2d82247a0370