Don't close already closed connections in

Don't close already closed connections in
QuicClientSession::CloseSessionOnErrorInner.

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=271548

[Ryan Hamilton, 2014-05-16 21:06:11]

Frankly, I'm not sure it should be an error to close an already closed
connection, but since it is an error, this avoids it :>

[jar (doing other things), 2014-05-19 16:01:24]

lgtm

[commit-bot: I haz the power, 2014-05-19 16:01:36]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/rch@chromium.org/284303007/1

[commit-bot: I haz the power, 2014-05-19 19:15:20]

FYI, CQ is re-trying this CL (attempt #1).
Please consider checking whether the failures are real,
and report flakes to chrome-troopers@google.com.
The failing builders are:
  android_dbg_triggered_tests on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/android_dbg_triggered...)

[commit-bot: I haz the power, 2014-05-19 19:50:48]

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

[commit-bot: I haz the power, 2014-05-19 19:50:49]

Try jobs failed on following builders:
  android_dbg_triggered_tests on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/android_dbg_triggered...)

[Ryan Hamilton, 2014-05-19 23:04:52]

The CQ bit was checked by rch@chromium.org

[commit-bot: I haz the power, 2014-05-19 23:06:16]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/rch@chromium.org/284303007/1

[commit-bot: I haz the power, 2014-05-20 00:24:12]

FYI, CQ is re-trying this CL (attempt #1).
Please consider checking whether the failures are real,
and report flakes to chrome-troopers@google.com.
The failing builders are:
  android_dbg_triggered_tests on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/android_dbg_triggered...)

[commit-bot: I haz the power, 2014-05-20 01:23:18]

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

[commit-bot: I haz the power, 2014-05-20 01:23:18]

Try jobs failed on following builders:
  android_dbg_triggered_tests on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/android_dbg_triggered...)

[Ryan Hamilton, 2014-05-20 01:30:51]

The CQ bit was checked by rch@chromium.org

[commit-bot: I haz the power, 2014-05-20 01:31:22]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/rch@chromium.org/284303007/1

[commit-bot: I haz the power, 2014-05-20 02:53:59]

Change committed as 271548