Land Recent QUIC Changes.

Land Recent QUIC Changes.

Fix QUIC faster stats reporting memory leaks and crashes by changing
lifetime once again.  Now QuicAckNotify::DelegateInterface, one of the
base classes of QuicFasterStatsGatherer, is ref-counted so
QuicFasterStatsGatherer is guanrateed to be around until either faster
stats reporting happens or the last ack is delivered by the
QuicConnection.

Merge internal change: 59228960
https://codereview.chromium.org/126543005/


Add a test requested by rch@ in cr/59053386 to replicate a potential
DCHECK failure.

Merge internal change: 59147972
https://codereview.chromium.org/127563002/


QUIC - Syncing with internal source code. Fixing the include
order. Added missing OVERRIDE.

Merge internal change: 59061118
https://codereview.chromium.org/127553002/


Make TimeWaitListManager use PacketWriter's socket writability state.

Merge internal change: 59058066
https://codereview.chromium.org/127523002/


Make QuicPacketWriter keep track of socket writability; expose the
underlying writer's state instead of keeping a separate variable in
Dispatcher.

Eventually we'll thread this to session/connection as suggested in
a TODO.

Merge internal change: 59055651
https://codereview.chromium.org/127503002/


Fix a QUIC DCHECK flakiness caused by not checking if a packet is
pending before asserting that it's in the sent_packet_map.

Merge internal change: 59053386
https://codereview.chromium.org/127003002/


QUIC Cleanup to remove pending_packets from QuicSentPacketManager and
use a flag in unacked_packets_.

Replaced FindOrNull and FindOrDie with find() call.

Merge internal change: 59015729
https://codereview.chromium.org/126983002/

R=rch@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=243619

[ramant (doing other things), 2014-01-08 04:33:50]

Updated the URL for the following change (git cl upload of changes, failed
earlier for Merge internal change: 59228960)

Merge internal change: 59228960 
https://codereview.chromium.org/126543005/

[Ryan Hamilton, 2014-01-08 04:46:30]

lgtm

[commit-bot: I haz the power, 2014-01-08 07:28:32]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/rtenneti@chromium.org/127633002/1

[commit-bot: I haz the power, 2014-01-08 08:39:54]

Retried try job too often on win_rel for step(s) base_unittests, browser_tests,
interactive_ui_tests, net_unittests, unit_tests
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=win_rel&nu...

[commit-bot: I haz the power, 2014-01-08 16:46:27]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/rtenneti@chromium.org/127633002/1

[commit-bot: I haz the power, 2014-01-08 19:02:05]

Change committed as 243619