Use EXPECT instead of DCHECK in traffic_stats_unittest

Use EXPECT instead of DCHECK in traffic_stats_unittest

If the unit test is run and the DCHECK fails on an Android device it will crash
the browser and report unknown to the test runner for this test and all
successive tests, making it difficult to find the failing assertion and failing
test.

BUG=NONE

Committed: https://crrev.com/9ebaf878de33c358b12a7066b811f54f1571c801
Cr-Commit-Position: refs/heads/master@{#370777}

[Daniel Imms, 2016-01-21 18:18:52]

daniimms@amazon.com changed reviewers:
+ asanka@chromium.org

[Daniel Imms, 2016-01-21 18:18:53]

PTAL

[asanka, 2016-01-21 19:51:43]

lgtm

[Daniel Imms, 2016-01-21 20:02:57]

The CQ bit was checked by daniimms@amazon.com

[commit-bot: I haz the power, 2016-01-21 20:04:46]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1617593004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1617593004/1

[commit-bot: I haz the power, 2016-01-21 20:38:50]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-01-21 20:41:13]

Description was changed from

==========
Use EXPECT instead of DCHECK in traffic_stats_unittest

If the unit test is run and the DCHECK fails on an Android device it will crash
the browser and report unknown to the test runner for this test and all
successive tests, making it difficult to find the failing assertion and failing
test.

BUG=NONE
==========

to

==========
Use EXPECT instead of DCHECK in traffic_stats_unittest

If the unit test is run and the DCHECK fails on an Android device it will crash
the browser and report unknown to the test runner for this test and all
successive tests, making it difficult to find the failing assertion and failing
test.

BUG=NONE

Committed: https://crrev.com/9ebaf878de33c358b12a7066b811f54f1571c801
Cr-Commit-Position: refs/heads/master@{#370777}
==========

[commit-bot: I haz the power, 2016-01-21 20:41:14]

Patchset 1 (id:??) landed as
https://crrev.com/9ebaf878de33c358b12a7066b811f54f1571c801
Cr-Commit-Position: refs/heads/master@{#370777}