Avoid warnings in NetworkQualityEstimatorTest.TestCaching

Avoid warnings in NetworkQualityEstimatorTest.TestCaching

Gets rid of the following compilation errors:
../../net/base/network_quality_estimator_unittest.cc:465:118: error: expression with side effects has no effect in an unevaluated context [-Werror,-Wunevaluated-expression]
../../net/base/network_quality_estimator_unittest.cc:476:118: error: expression with side effects has no effect in an unevaluated context [-Werror,-Wunevaluated-expression]

Committed: https://crrev.com/906741c85d7e7a5abcef3bedc9b0e31091afd365
Cr-Commit-Position: refs/heads/master@{#348384}

[fs, 2015-09-11 11:14:01]

fs@opera.com changed reviewers:
+ bengr@chromium.org, tbansal@chromium.org

[bengr, 2015-09-11 12:40:38]

lgtm

[fs, 2015-09-11 12:57:09]

The CQ bit was checked by fs@opera.com

[commit-bot: I haz the power, 2015-09-11 12:57:13]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1335943002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1335943002/1

[commit-bot: I haz the power, 2015-09-11 13:02:24]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-11 13:03:20]

Patchset 1 (id:??) landed as
https://crrev.com/906741c85d7e7a5abcef3bedc9b0e31091afd365
Cr-Commit-Position: refs/heads/master@{#348384}

[commit-bot: I haz the power, 2015-09-23 12:21:48]

Patchset 1 (id:??) landed as
https://crrev.com/906741c85d7e7a5abcef3bedc9b0e31091afd365
Cr-Commit-Position: refs/heads/master@{#348384}