Landing Recent QUIC changes until 8/26/2015 19:47 UTC.

Landing Recent QUIC changes until 8/26/2015 19:47 UTC.

Fix code relying on undocumented SimpleAtoi quirk, which caused rollback
of cl/101239633. The quirk was that if an input contained null byte,
everything past this byte would be silently ignored; this behavior will
soon be removed.

relnote: n/a (only affects tests)

       passes with strings change patched in.

Ported this server side change to keep code similar to internal code.

Merge internal change: 101605155
https://codereview.chromium.org/1308323012/

relnote: clang_tidy (tidy up). Fixed include order.

Merge internal change: 101595102
https://codereview.chromium.org/1321663007/

relnote: Deprecate FLAGS_quic_allow_ip_migration.

Merge internal change: 101489487
https://codereview.chromium.org/1334583002/

relnote: Cache-align the encryption buffer in QuicPacketGenerator::SerializeAndSendPacket.

The optimized crypto algorithms operate best on aligned memory. This
saves about 0.6% wall time and 0.6% CPU time in QUIC.

Merge internal change: 101462412
https://codereview.chromium.org/1327743005/

relnote: Close the QUIC connection when a packet is about to be sent out
of order instead of attempting to send it.

Merge internal change: 101391398
https://codereview.chromium.org/1304833006/

relnote: Deprecate FLAGS_quic_dont_write_when_flow_unblocked.

Merge internal change: 101389540
https://codereview.chromium.org/1329693006/

relnote: Don't add burst tokens to QUIC's PacingSender when in recovery.
Reduces over-aggressive sending at small CWNDs.

Merge internal change: 101384906
https://codereview.chromium.org/1313623006/

R=rch@chromium.org

Committed: https://crrev.com/a8fb60cbd034ddf1c45e592e2e85b394d3741739
Cr-Commit-Position: refs/heads/master@{#348191}

[Ryan Hamilton, 2015-09-10 14:28:18]

lgtm

[ramant (doing other things), 2015-09-10 16:55:30]

The CQ bit was checked by rtenneti@chromium.org

[commit-bot: I haz the power, 2015-09-10 16:56:41]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1335443002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1335443002/1

[commit-bot: I haz the power, 2015-09-10 18:18:04]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-10 18:18:35]

Patchset 1 (id:??) landed as
https://crrev.com/a8fb60cbd034ddf1c45e592e2e85b394d3741739
Cr-Commit-Position: refs/heads/master@{#348191}

[commit-bot: I haz the power, 2015-09-23 12:12:18]

Patchset 1 (id:??) landed as
https://crrev.com/a8fb60cbd034ddf1c45e592e2e85b394d3741739
Cr-Commit-Position: refs/heads/master@{#348191}