Relax the stun ping check on valid result

Relax the stun ping check on valid result.

1. allow situation where all ping is lost
2. use the raw count to calculate the interval.

Since we now send 1 request per IP, the chance of losing all of them is higher and we shouldn't just quit if we don't have any response.

BUG=

Committed: https://crrev.com/066ded99cbdb2e110116335bf604709b21ef25a9
Cr-Commit-Position: refs/heads/master@{#10613}

[guoweis_webrtc, 2015-11-04 23:02:38]

Description was changed from

==========
Relax the stun ping check on valid result

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

to

==========
Relax the stun ping check on valid result.

1. allow situation where all ping is lost
2. use the raw count to calculate the interval.

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

[guoweis_webrtc, 2015-11-04 23:02:38]

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

[guoweis_webrtc, 2015-11-04 23:17:52]

Description was changed from

==========
Relax the stun ping check on valid result.

1. allow situation where all ping is lost
2. use the raw count to calculate the interval.

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

to

==========
Relax the stun ping check on valid result.

1. allow situation where all ping is lost
2. use the raw count to calculate the interval.

Since we now send 1 request per IP, the chance of losing all of them is higher
and we shouldn't just quit if we don't have any response.

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

[guoweis_webrtc, 2015-11-04 23:28:02]

guoweis@webrtc.org changed reviewers:
+ sergeyu@chromium.org

[guoweis_webrtc, 2015-11-04 23:28:03]

+sergeyu

[pthatcher1, 2015-11-11 20:01:51]

lgtm

[guoweis_webrtc, 2015-11-11 21:57:25]

The CQ bit was checked by guoweis@webrtc.org

[commit-bot: I haz the power, 2015-11-11 21:57:34]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1406223011/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1406223011/20001

[commit-bot: I haz the power, 2015-11-11 23:04:11]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-11-11 23:04:21]

Patchset 2 (id:??) landed as
https://crrev.com/066ded99cbdb2e110116335bf604709b21ef25a9
Cr-Commit-Position: refs/heads/master@{#10613}