Fix to zoom on Vulkan Viewer

Fix to zoom on Vulkan Viewer

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1876853003

Committed: https://skia.googlesource.com/skia/+/2a0bb0a6653b2b454d1c8a955ccf4bd1deb02109

[egdaniel, 2016-04-11 15:13:38]

Description was changed from

==========
Fix to zoom on Vulkan Viewer

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

to

==========
Fix to zoom on Vulkan Viewer

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

[egdaniel, 2016-04-11 15:14:20]

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

[jvanverth1, 2016-04-11 15:19:31]

lgtm

[egdaniel, 2016-04-11 15:20:04]

The CQ bit was checked by egdaniel@google.com

[commit-bot: I haz the power, 2016-04-11 15:20:10]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1876853003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1876853003/1

[commit-bot: I haz the power, 2016-04-11 15:30:42]

Description was changed from

==========
Fix to zoom on Vulkan Viewer

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

to

==========
Fix to zoom on Vulkan Viewer

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/+/2a0bb0a6653b2b454d1c8a955ccf4bd1deb02109
==========

[commit-bot: I haz the power, 2016-04-11 15:30:43]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/2a0bb0a6653b2b454d1c8a955ccf4bd1deb02109