Landing Recent QUIC changes until 9/2/2015 17:00 UTC.

Landing Recent QUIC changes until 9/2/2015 17:00 UTC.

relnote: Add varz peer_ip_changes and successful_peer_ip_migrations
(no functional change).

Now peer_port_changes and successful_peer_port_migrations only count for
port rebindings.

Merge internal change: 102152517
https://codereview.chromium.org/1338423006/

relnote: Add MigrateSocket method to quic_test_client. In loadtesting,
a QUIC client can migrate its port before the last request is sent
during an active connection. Enabled by
quic_client_port_migration_for_test.

Merge internal change: 102081905
https://codereview.chromium.org/1332223003/

relnote: Fixes test and flag description (addressing comments in
cl/101977605.)

Merge internal change: 102047537
https://codereview.chromium.org/1340113002/

relnote: n/a (tidy up) clang_tidy

Merge internal change: 102038333
https://codereview.chromium.org/1344613003/

relnote: Fixes bug in QUIC's cubic code that caused inflation in
congestion window after quiescence. Flag protected under
FLAGS_reset_cubic_epoch_when_app_limited

Merge internal change: 101977605
https://codereview.chromium.org/1335303005/

relnote:  Deprecate FLAGS_exact_stream_id_delta, which has always
defaulted true.

Merge internal change: 101965767
https://codereview.chromium.org/1337113006/

R=rch@chromium.org

Committed: https://crrev.com/33106d1ca8e550259865dcc3be84d1c53593a1a0
Cr-Commit-Position: refs/heads/master@{#349145}

[Ryan Hamilton, 2015-09-16 03:11:31]

lgtm

[ramant (doing other things), 2015-09-16 16:47:39]

The CQ bit was checked by rtenneti@chromium.org

[commit-bot: I haz the power, 2015-09-16 16:48:29]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1343093003/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1343093003/20001

[commit-bot: I haz the power, 2015-09-16 16:53:31]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-09-16 16:54:31]

Patchset 2 (id:??) landed as
https://crrev.com/33106d1ca8e550259865dcc3be84d1c53593a1a0
Cr-Commit-Position: refs/heads/master@{#349145}

[commit-bot: I haz the power, 2015-09-23 12:57:02]

Patchset 2 (id:??) landed as
https://crrev.com/33106d1ca8e550259865dcc3be84d1c53593a1a0
Cr-Commit-Position: refs/heads/master@{#349145}