Land Recent QUIC Changes.

Land Recent QUIC Changes.

Tiny refactor of QuicSentPacketManager::NetworkChangeVisitor's
OnCongestionWindowChange() method to take no arguments, and require the
caller to fetch the updated congestion window.

Slightly simplifies the code. In preparation for the larger
GetCongestionWindowInPackets() cleanup.

Merge internal change: 78883300
https://codereview.chromium.org/694383002/

Change the number of emulated connections in QUIC's congestion control
as the number of open streams changes when the NCON connection option is
supplied.

Merge internal change: 78876869
https://codereview.chromium.org/682293004/

Merge changes to keep chromium source tree same as internal source tree.

Merge internal change: 78853598
https://codereview.chromium.org/693253002/

QUIC: Only send a new SCUP if enough packets have been sent since the
last SCUP.

Merge internal change: 78841268
https://codereview.chromium.org/699433002/

Fixes reduction for n-connection emulation in TCP Reno.

Merge internal change: 78812645
https://codereview.chromium.org/680253005/

Delay a QUIC server's use of the FORWARD_SECURE encrypter until the
client has had a chance to start using it.

Protected by FLAGS_enable_quic_delay_forward_security.

When the forward secure encrypter is available, don't use it until one
of two things happens:
1) the peers starts sending forward secure encrypted packets
2) 2 round trips worth of packets have been sent, in case something
   (MitM?) is preventing the peer from using forward secure encryption.

Merge internal change: 78801773

Set FLAGS_enable_quic_delay_forward_security to true in chromium.

https://codereview.chromium.org/698703003/

Change QUIC's Reno congestion controller to use a higher beta. Fixed
tests to be independent of beta.

Merge internal change: 78728349
https://codereview.chromium.org/698713002/

R=rch@chromium.org

Committed: https://crrev.com/33da8ab021168895957e45ad4d1af9e991a2c665
Cr-Commit-Position: refs/heads/master@{#302571}

[ramant (doing other things), 2014-11-03 18:10:24]

Hi Ryan,
  If changes look good, will land this CL after this week's Dev branch is cut
(later in the evening).

thanks
raman

[Ryan Hamilton, 2014-11-03 18:13:57]

lgtm

[ramant (doing other things), 2014-11-04 01:10:09]

Patchset #3 (id:40001) has been deleted

[ramant (doing other things), 2014-11-04 01:10:54]

The CQ bit was checked by rtenneti@chromium.org

[commit-bot: I haz the power, 2014-11-04 01:12:10]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/694393002/60001

[commit-bot: I haz the power, 2014-11-04 04:17:08]

Committed patchset #3 (id:60001)

[commit-bot: I haz the power, 2014-11-04 04:17:43]

Patchset 3 (id:??) landed as
https://crrev.com/33da8ab021168895957e45ad4d1af9e991a2c665
Cr-Commit-Position: refs/heads/master@{#302571}