Test case for CL 1437933002

Test case for CL 1437933002.

This is to make sure that we don't have any assert failure when running with adapter enumeration disabled and we have no IPv6 default local address.

BUG=webrtc:5061
Committed: https://crrev.com/255d6f6fb28f78a5b77f4b4ee0da24524e4371c6
Cr-Commit-Position: refs/heads/master@{#10759}

[guoweis_webrtc, 2015-11-17 19:24:31]

Description was changed from

==========
fix


Revert "Revert "When running this code in chromium on a machine with IPv6
disabled, the RTC_DCHECK fails and in release build, it could leak to further
crash in chromium's rtc_peer_connection_hanlder.cc.""

This reverts commit bad2ed2fdb51f38c4992269b8762dce5636bdfe0.

Revert "When running this code in chromium on a machine with IPv6 disabled, the
RTC_DCHECK fails and in release build, it could leak to further crash in
chromium's rtc_peer_connection_hanlder.cc."

This reverts commit e03cab94c1bac43f4d6c4775023a957f98ee8132.

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

to

==========
Test case for CL 1437933002.

This is to make sure that we don't have any assert failure when running with
adapter enumeration disabled and we have no IPv6 default local address.

BUG=webrtc:5061
==========

[guoweis_webrtc, 2015-11-17 19:24:31]

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

[pthatcher, 2015-11-23 20:38:27]

pthatcher@google.com changed reviewers:
+ pthatcher@google.com

[pthatcher, 2015-11-23 20:38:27]

lgtm

[guoweis_webrtc, 2015-11-23 20:38:38]

The CQ bit was checked by guoweis@webrtc.org

[commit-bot: I haz the power, 2015-11-23 20:38:46]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1456663002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1456663002/20001

[pthatcher1, 2015-11-23 20:39:39]

lgtm

[commit-bot: I haz the power, 2015-11-23 22:12:42]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-11-23 22:12:52]

Patchset 2 (id:??) landed as
https://crrev.com/255d6f6fb28f78a5b77f4b4ee0da24524e4371c6
Cr-Commit-Position: refs/heads/master@{#10759}