Land Recent QUIC Changes until 03/09/2015.

Land Recent QUIC Changes until 03/09/2015.

Add a new method to the QuicUnackedPacketMap to stop retransmitting
stream frames for a given stream.

Will be wired up so that data will not be restransmitted for a stream
that is reset. No behavior changes in this CL.

Merge internal change: 88162937
https://codereview.chromium.org/1008593005/

Create a TcpCubicSender in QUIC that tracks the congestion window in
bytes, instead of packets.

Merge internal change: 88159377
https://codereview.chromium.org/1009023002/

Remove FLAGS_quic_enable_pacing flag now that pacing is on by default
globally.

Merge internal change: 88152071
https://codereview.chromium.org/1006113002/

Plumb through sent/received CachedNetworkParamaters to populate
TransportConnectionStats.

Merge internal change: 88144945
https://codereview.chromium.org/1010463002/

QUIC - Initialize QuicConfig's negotiated_value_ to 0. IMO, it is not
necessary to initialize it (could calm some compiler warnings??).

Minor change to fix compiler warnings in chromium.

Merge internal change: 88129037
https://codereview.chromium.org/1008473003/

Create a QUIC connection option to set the min CWND to 1 packet instead
of 2 in TcpCubicSender.

Merge internal change: 88045604
https://codereview.chromium.org/1001933003/

R=rch@chromium.org

Committed: https://crrev.com/73e25c1b46d6da0e1a3f49f72889975129ea2d2f
Cr-Commit-Position: refs/heads/master@{#320699}

[Ryan Hamilton, 2015-03-16 03:16:07]

lgtm

[ramant (doing other things), 2015-03-16 03:27:06]

The CQ bit was checked by rtenneti@chromium.org

[commit-bot: I haz the power, 2015-03-16 03:27:18]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1014433002/20001

[ramant (doing other things), 2015-03-16 06:12:15]

The CQ bit was checked by rtenneti@chromium.org

[commit-bot: I haz the power, 2015-03-16 06:12:19]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1014433002/20001

[commit-bot: I haz the power, 2015-03-16 06:12:54]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-03-16 06:13:33]

Patchset 2 (id:??) landed as
https://crrev.com/73e25c1b46d6da0e1a3f49f72889975129ea2d2f
Cr-Commit-Position: refs/heads/master@{#320699}