Fixes for 32bit win Vulkan build

Fix 32bit win Vulkan build
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1781013002

Committed: https://skia.googlesource.com/skia/+/a6b439a0af614e2e79b35ad41df7b72736d5d1b9

[bsalomon, 2016-03-10 17:56:49]

Description was changed from

==========
Fix 32bit win Vulkan build
==========

to

==========
Fix 32bit win Vulkan build
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
==========

[bsalomon, 2016-03-10 19:54:00]

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

[egdaniel, 2016-03-10 19:57:23]

lgtm

[bsalomon, 2016-03-10 20:15:58]

The CQ bit was checked by bsalomon@google.com

[commit-bot: I haz the power, 2016-03-10 20:16:03]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1781013002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1781013002/1

[commit-bot: I haz the power, 2016-03-10 20:31:23]

Description was changed from

==========
Fix 32bit win Vulkan build
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
==========

to

==========
Fix 32bit win Vulkan build
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...

Committed:
https://skia.googlesource.com/skia/+/a6b439a0af614e2e79b35ad41df7b72736d5d1b9
==========

[commit-bot: I haz the power, 2016-03-10 20:31:24]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/a6b439a0af614e2e79b35ad41df7b72736d5d1b9