QUIC - Added the following finch trial parameters to disable QUIC if

QUIC - Added the following finch trial parameters to disable QUIC if
the packet loss rate is bad for multiple connections in a row.

+ max_number_of_lossy_connections: specifies the maximum number of
  connections with high packet loss in a row after which QUIC will be
  disabled.

+ packet_loss_threshold:  specifies packet loss rate in franction after
  which a connection is closed and is considered as a lossy connection.

QUIC changes to support this were checked in the following CL:
  https://codereview.chromium.org/1025573002/

R=rch@chromium.org

Committed: https://crrev.com/374e5688645005b741b2ef9037ee84a29f115706
Cr-Commit-Position: refs/heads/master@{#322704}

[Ryan Hamilton, 2015-03-28 03:15:22]

lgtm

[ramant (doing other things), 2015-03-28 13:46:51]

The CQ bit was checked by rtenneti@chromium.org

[commit-bot: I haz the power, 2015-03-28 13:46:55]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1041953003/20001

[commit-bot: I haz the power, 2015-03-28 13:50:02]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-03-28 13:50:40]

Patchset 2 (id:??) landed as
https://crrev.com/374e5688645005b741b2ef9037ee84a29f115706
Cr-Commit-Position: refs/heads/master@{#322704}