Minor cleanup of QuicChromiumClientStreamTest

Minor cleanup of QuicChromiumClientStreamTest
* Remove an unused MOCK_METHOD
* Create a "real" stream instead of a "test" stream.

BUG=716563
Review-Url: https://codereview.chromium.org/2880483002
Cr-Commit-Position: refs/heads/master@{#470755}
Committed: https://chromium.googlesource.com/chromium/src/+/43535f1beb4135a9f860fdae5b99ec0a5e4e9374

[Ryan Hamilton, 2017-05-10 22:31:30]

rch@chromium.org changed reviewers:
+ zhongyi@chromium.org

[Ryan Hamilton, 2017-05-10 22:34:43]

The CQ bit was checked by rch@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-05-10 22:36:04]

Dry run: CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[Zhongyi Shi, 2017-05-10 22:37:45]

lgtm

[Ryan Hamilton, 2017-05-10 22:41:18]

The CQ bit was unchecked by rch@chromium.org

[Ryan Hamilton, 2017-05-10 22:41:22]

The CQ bit was checked by rch@chromium.org

[commit-bot: I haz the power, 2017-05-10 22:41:29]

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, 2017-05-10 23:50:44]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1494456082422400, "parent_rev":
"7d206e9b6321662d3ad62d4b19b6fb37a0607058", "commit_rev":
"43535f1beb4135a9f860fdae5b99ec0a5e4e9374"}

[commit-bot: I haz the power, 2017-05-10 23:50:53]

Description was changed from

==========
Minor cleanup of QuicChromiumClientStreamTest
* Remove an unused MOCK_METHOD
* Create a "real" stream instead of a "test" stream.

BUG=716563
==========

to

==========
Minor cleanup of QuicChromiumClientStreamTest
* Remove an unused MOCK_METHOD
* Create a "real" stream instead of a "test" stream.

BUG=716563

Review-Url: https://codereview.chromium.org/2880483002
Cr-Commit-Position: refs/heads/master@{#470755}
Committed:
https://chromium.googlesource.com/chromium/src/+/43535f1beb4135a9f860fdae5b99...
==========

[commit-bot: I haz the power, 2017-05-10 23:50:54]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/43535f1beb4135a9f860fdae5b99...