Land Recent QUIC Changes.

Land Recent QUIC Changes.

Change the pre-handshake idle timeout to 5s from 120s, and the default
idle timeout is 30s.

This ensures clients don't wait more than 5s if the connection has UDP
blackholed.

Merge internal change: 76444120
https://codereview.chromium.org/610073002/

Add a convenience method to check for client supplied options in
QuicSentPacketManager.

Merge internal change: 76423808
https://codereview.chromium.org/607803004/

Add a QUIC tag to connection options to allow negotiating 1 connection
emulation in congestion control algorithms.

Merge internal change: 76351810
https://codereview.chromium.org/606503004/

Allow the number of connections QUIC's send algorithms simulate to
change, either initially or throughout the connection.

Merge internal change: 76297032
https://codereview.chromium.org/610053002/

Remove support for QUIC_VERSION_16.

Merge internal change: 76286812
https://codereview.chromium.org/601663004/

QUIC server max streams is now at least 10 streams larger than
configured limit. Protected by existing
FLAGS_quic_allow_more_open_streams.

Merge internal change: 76269911
https://codereview.chromium.org/607763007/

No functional change.  Rename QuicConfig methods from lowercase with
underscores to CamelCase, since they're not direct field accessors.

Merge internal change: 76185470
https://codereview.chromium.org/608453007/

Add a test to ensure QUIC's TcpCubicSender always allows packets to be
sent when there is less than a packet in flight.

Merge internal change: 76165601
https://codereview.chromium.org/608003002/

Merge QuicSentPacketManager::DebugDelegate's OnSentPacket,
OnRetransmittedPacket, and OnSerializedPacket into one OnSentPacket.

Merge internal change: 76088200
https://codereview.chromium.org/607983002/

Remove OnPacketRetransmitted from QuicConnectionDebugVisitor.

Merge internal change: 76084748
https://codereview.chromium.org/605263003/

R=rch@chromium.org

Committed: https://crrev.com/b5512bbf96db9a3df17f324f79f883a9dd15bf7a
Cr-Commit-Position: refs/heads/master@{#297225}

[Ryan Hamilton, 2014-09-27 04:13:58]

lgtm

[ramant (doing other things), 2014-09-29 18:18:32]

The CQ bit was checked by rtenneti@chromium.org

[commit-bot: I haz the power, 2014-09-29 18:20:10]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/605163004/1

[commit-bot: I haz the power, 2014-09-29 19:17:23]

Committed patchset #1 (id:1) as de37f0afcf8e30ef1fc35589645b95802a5ae9b4

[commit-bot: I haz the power, 2014-09-29 19:18:20]

Patchset 1 (id:??) landed as
https://crrev.com/b5512bbf96db9a3df17f324f79f883a9dd15bf7a
Cr-Commit-Position: refs/heads/master@{#297225}