Fix SampleApp compilation with skia_gpu=0

Fix SampleApp compilation with skia_gpu=0

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2347593002

Committed: https://skia.googlesource.com/skia/+/1dfec74d6babf41167b7c740290a091ac50c5f51

[Brian Osman, 2016-09-15 13:39:49]

Description was changed from

==========
Fix SampleApp compilation with skia_gpu=0

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

to

==========
Fix SampleApp compilation with skia_gpu=0

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2347593002
==========

[Brian Osman, 2016-09-15 13:41:03]

brianosman@google.com changed reviewers:
+ borenet@google.com

[Brian Osman, 2016-09-15 13:41:15]

The CQ bit was checked by brianosman@google.com

[commit-bot: I haz the power, 2016-09-15 13:41:18]

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, 2016-09-15 13:41:19]

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 2016-09-15 19:41 UTC

[borenet, 2016-09-15 13:49:06]

LGTM

[commit-bot: I haz the power, 2016-09-15 14:19:55]

Description was changed from

==========
Fix SampleApp compilation with skia_gpu=0

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2347593002
==========

to

==========
Fix SampleApp compilation with skia_gpu=0

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2347593002

Committed:
https://skia.googlesource.com/skia/+/1dfec74d6babf41167b7c740290a091ac50c5f51
==========

[commit-bot: I haz the power, 2016-09-15 14:19:55]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/1dfec74d6babf41167b7c740290a091ac50c5f51