SkStream Testing: fix bug in new unit test.

SkStream Testing: fix bug in new unit test.

Committed: https://skia.googlesource.com/skia/+/d75e21dadea4362d30a71c6b13f6d958a0e887de

[hal.canary, 2015-08-19 14:05:34]

The CQ bit was checked by halcanary@google.com to run a CQ dry run

[commit-bot: I haz the power, 2015-08-19 14:05:47]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1297143004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1297143004/1

[hal.canary, 2015-08-19 14:06:14]

halcanary@google.com changed reviewers:
+ mtklein@google.com

[mtklein_C, 2015-08-19 14:11:25]

mtklein@chromium.org changed reviewers:
+ mtklein@chromium.org

[mtklein_C, 2015-08-19 14:11:26]

lgtm

[commit-bot: I haz the power, 2015-08-19 14:11:58]

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

[commit-bot: I haz the power, 2015-08-19 14:11:58]

Dry run: This issue passed the CQ dry run.

[hal.canary, 2015-08-19 14:21:21]

The CQ bit was checked by halcanary@google.com

[commit-bot: I haz the power, 2015-08-19 14:21:27]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1297143004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1297143004/1

[commit-bot: I haz the power, 2015-08-19 14:22:06]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/d75e21dadea4362d30a71c6b13f6d958a0e887de