Fix a TSAN failure of QUIC's EndToEndTest where the value of

Fix a TSAN failure of QUIC's EndToEndTest where the value of
QuicConnectionStats were being checked while the server thread was
modifying them.

Merge internal change: 65521936

R=rch@chromium.org
BUG=366594
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=266111

[Ryan Hamilton, 2014-04-24 17:58:07]

lgtm

[ramant (doing other things), 2014-04-24 17:58:59]

The CQ bit was checked by rtenneti@chromium.org

[commit-bot: I haz the power, 2014-04-24 21:50:44]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/rtenneti@chromium.org/259613002/1

[commit-bot: I haz the power, 2014-04-24 23:49:29]

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

[commit-bot: I haz the power, 2014-04-24 23:49:30]

Try jobs failed on following builders:
  tryserver.chromium on linux_chromium_chromeos_rel

[oshima, 2014-04-24 23:52:39]

The CQ bit was checked by oshima@chromium.org

[commit-bot: I haz the power, 2014-04-24 23:53:16]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/rtenneti@chromium.org/259613002/1

[commit-bot: I haz the power, 2014-04-25 00:56:59]

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

[commit-bot: I haz the power, 2014-04-25 00:56:59]

Try jobs failed on following builders:
  tryserver.chromium on linux_chromium_chromeos_rel

[oshima, 2014-04-25 01:01:44]

The CQ bit was checked by oshima@chromium.org

[commit-bot: I haz the power, 2014-04-25 01:03:13]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/rtenneti@chromium.org/259613002/1

[commit-bot: I haz the power, 2014-04-25 03:10:17]

Change committed as 266111