When all connections timed out on writing, delete them all.

When all connections timed out on writing, delete them all.
BUG=5111
Committed: https://crrev.com/77d0d6e858203cbc559b2f5d6ffabb7bc2fcb8e6
Cr-Commit-Position: refs/heads/master@{#10431}

[honghaiz3, 2015-10-24 00:54:22]

honghaiz@webrtc.org changed reviewers:
+ pthatcher@webrtc.org

[pthatcher1, 2015-10-27 07:25:03]

lgtm

[honghaiz3, 2015-10-27 17:05:34]

The CQ bit was checked by honghaiz@webrtc.org

[honghaiz3, 2015-10-27 17:05:35]

The patchset sent to the CQ was uploaded after l-g-t-m from pthatcher@webrtc.org
Link to the patchset: https://codereview.webrtc.org/1421123003/#ps20001 (title:
"Merge to head")

[commit-bot: I haz the power, 2015-10-27 17:05:39]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1421123003/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1421123003/20001

[commit-bot: I haz the power, 2015-10-27 18:34:48]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-10-27 18:35:01]

Patchset 2 (id:??) landed as
https://crrev.com/77d0d6e858203cbc559b2f5d6ffabb7bc2fcb8e6
Cr-Commit-Position: refs/heads/master@{#10431}