Land Recent QUIC Changes.

Land Recent QUIC Changes.

Remove unused QuicDecrypter::Decrypt method and implementations.

Merge internal change: 84548556
https://codereview.chromium.org/868953002/

Changed verify_details_ check to verify_details_.get() to keep code in
sync with internal source.

Merge internal change: 84442484
https://codereview.chromium.org/872483002/

Removing an obselete TOOD. It is obselte becasue FrameOverlapsBufferedData
does this.

Merge internal change: 84372263
https://codereview.chromium.org/871733002/

Replace the map in QuicAckNotifier with a counter.
No functionality change.

This reduces memory and CPU usage of the ack notifier.

Merge internal change: 84345868
https://codereview.chromium.org/867033002/

Change some of QUIC's AckNotifier datastructures from maps to hashmaps
and sets to lists.  No behavior change.

This should reduce CPU consumption substantially, particularly on
internal servers.

Merge internal change: 84156430
https://codereview.chromium.org/870733002/

Add a new RTO connection option to QUIC.  Flag protected behind the
existing flag FLAGS_quic_use_new_rto.

This new RTO connection option uses loss detection to reduce the
congestion window after an RTO, instead of always reducing the
CWND to 2.

Merge internal change: 84036848
https://codereview.chromium.org/824693007/

QUIC - sync'ing with internal source tree changes.

Minor change to keep the code similar to chromium and internal tree.

Merge internal change: 83993217
https://codereview.chromium.org/870723002/

Fix a bug in QUIC's RTO.  Flag protected by FLAGS_quic_use_new_rto.

Ensures a beta based loss reduction is not triggered directly before
OnRetransmissionTimeout when recovering from RTO.

Merge internal change: 83986840
https://codereview.chromium.org/868813003/

R=rch@chromium.org

Committed: https://crrev.com/cf54a52c111f2f2d9a1b77a13a8fc8a064261459
Cr-Commit-Position: refs/heads/master@{#313081}

[ramant (doing other things), 2015-01-23 01:03:15]

Patchset #3 (id:40001) has been deleted

[ramant (doing other things), 2015-01-23 03:04:38]

Patchset #3 (id:60001) has been deleted

[ramant (doing other things), 2015-01-23 23:06:13]

Patchset #4 (id:90001) has been deleted

[ramant (doing other things), 2015-01-23 23:09:35]

Hi Ryan,
  This is a merged of all CL's you have already LGTM'ed. Used "assign" in
crypto_secret_boxer.cc and merged with TOT.

PTAL. thanks much.

[Ryan Hamilton, 2015-01-26 03:48:54]

lgtm

sorry for the delay!

[ramant (doing other things), 2015-01-26 16:22:17]

The CQ bit was checked by rtenneti@chromium.org

[commit-bot: I haz the power, 2015-01-26 16:22:43]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/868993002/20002

[commit-bot: I haz the power, 2015-01-26 17:02:22]

Committed patchset #4 (id:20002)

[commit-bot: I haz the power, 2015-01-26 17:03:08]

Patchset 4 (id:??) landed as
https://crrev.com/cf54a52c111f2f2d9a1b77a13a8fc8a064261459
Cr-Commit-Position: refs/heads/master@{#313081}