Remove various 'using std::' statements from QUIC code and use

Remove various 'using std::' statements from QUIC code and use
std:: prefixes instead.

BUG=

Committed: https://crrev.com/872e00e4be2d1bce4ad34224ae4dd5e8b9717f61
Cr-Commit-Position: refs/heads/master@{#435832}

[Ryan Hamilton, 2016-11-21 22:35:26]

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

[Victor Vasiliev, 2016-11-21 22:48:32]

LGTM provided that this compiles.

[Ryan Hamilton, 2016-11-21 23:37:35]

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

[commit-bot: I haz the power, 2016-11-21 23:38:14]

Dry run: 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, 2016-11-22 00:03:19]

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

[commit-bot: I haz the power, 2016-11-22 00:03:20]

Dry run: Try jobs failed on following builders:
  linux_chromium_clobber_rel_ng on master.tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[Ryan Hamilton, 2016-12-01 23:51:41]

Patchset #2 (id:20001) has been deleted

[Ryan Hamilton, 2016-12-01 23:53:00]

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

[Ryan Hamilton, 2016-12-01 23:53:01]

zhongyi: PTAL. Victor has LGTM'd but is not a committer.

[Zhongyi Shi, 2016-12-01 23:59:12]

lgtm

[Ryan Hamilton, 2016-12-02 00:37:05]

The CQ bit was checked by rch@chromium.org

[Ryan Hamilton, 2016-12-02 00:37:06]

The patchset sent to the CQ was uploaded after l-g-t-m from vasilvv@chromium.org
Link to the patchset: https://codereview.chromium.org/2524523002/#ps40001
(title: "Rebase")

[commit-bot: I haz the power, 2016-12-02 00:37:32]

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, 2016-12-02 02:48:22]

CQ is committing da patch.

Bot data: {"patchset_id": 40001, "attempt_start_ts": 1480639025689050,
"parent_rev": "b41214fbf48dfe480a092147a4abe8bfca7199b7", "commit_rev":
"55166184c929372b74b3ae7425a8f8e28429646f"}

[commit-bot: I haz the power, 2016-12-02 02:48:50]

Committed patchset #2 (id:40001)

[commit-bot: I haz the power, 2016-12-02 02:50:36]

Description was changed from

==========
Remove various 'using std::' statements from QUIC code and use
std:: prefixes instead.

BUG=
==========

to

==========
Remove various 'using std::' statements from QUIC code and use
std:: prefixes instead.

BUG=

Committed: https://crrev.com/872e00e4be2d1bce4ad34224ae4dd5e8b9717f61
Cr-Commit-Position: refs/heads/master@{#435832}
==========

[commit-bot: I haz the power, 2016-12-02 02:50:37]

Patchset 2 (id:??) landed as
https://crrev.com/872e00e4be2d1bce4ad34224ae4dd5e8b9717f61
Cr-Commit-Position: refs/heads/master@{#435832}