Land Recent QUIC Changes until 03/06/2015.

Land Recent QUIC Changes until 03/06/2015.

CL generated with data from dead-code analysis using
.../scythe:remove_dead_code

Dead code removal.

Merge internal change: 87991626
https://codereview.chromium.org/987693006/

Add 'explicit' to the PacketWriterFactoryAdapter constructor, as
complained about by Lint.

Merge internal change: 87956343
https://codereview.chromium.org/988963002/

Adds an assert to confirm that QUIC's session flow control window is
always larger than the stream flow control window, and fixes some tests.

Merge internal change: 87837841
https://codereview.chromium.org/987943003/

Implement the "sanity checks" described in b/9509040:  Incoming packets
whose connection ID is not associated with a session and is not recorded
as being in time-wait state are tested for reasonableness before a
session is created for them.  This won't protect much against deliberate
DoS but will screen out a reasonable fraction of truly junk packets.

Add sanity tests so we do not create connections for initial packets
with truncated connection IDs.

Merge internal change: 87831756
https://codereview.chromium.org/981193003/

Change the null value for packet sequence numbers to
kInvalidPacketSequenceNumber (== 0), which cannot appear as a packet
sequence number.

Update QuicFecGroupTest::UpdateAndRevive and
QuicFecGroupTest::UpdateAndReviveOutOfOrder to generate packet numbers
starting with 1 rather than 0.

Change the null value for packet sequence numbers to
kNullPacketSequenceNumber (== 0).

Merge internal change: 87819844
https://codereview.chromium.org/989743003/

R=rch@chromium.org

Committed: https://crrev.com/9e0fb50a74c11981a86c18ad507ece44735b3b98
Cr-Commit-Position: refs/heads/master@{#319581}

[Ryan Hamilton, 2015-03-07 03:18:54]

lgtm

[ramant (doing other things), 2015-03-07 06:19:21]

The CQ bit was checked by rtenneti@chromium.org

[commit-bot: I haz the power, 2015-03-07 06:20:31]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/990533002/1

[commit-bot: I haz the power, 2015-03-07 08:21:03]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-03-07 08:21:04]

Try jobs failed on following builders:
  mac_chromium_compile_dbg_ng on tryserver.chromium.mac (JOB_TIMED_OUT, no build
URL)
  mac_chromium_rel_ng on tryserver.chromium.mac (JOB_TIMED_OUT, no build URL)
Timed out jobs are not retried to avoid causing additional load on the builders
with large pending queues.

[ramant (doing other things), 2015-03-07 15:55:35]

The CQ bit was checked by rtenneti@chromium.org

[commit-bot: I haz the power, 2015-03-07 15:56:57]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/990533002/1

[commit-bot: I haz the power, 2015-03-07 17:57:46]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-03-07 17:57:47]

Try jobs failed on following builders:
  mac_chromium_compile_dbg_ng on tryserver.chromium.mac (JOB_TIMED_OUT, no build
URL)
  mac_chromium_rel_ng on tryserver.chromium.mac (JOB_TIMED_OUT, no build URL)
Timed out jobs are not retried to avoid causing additional load on the builders
with large pending queues.

[ramant (doing other things), 2015-03-08 05:04:20]

The CQ bit was checked by rtenneti@chromium.org

[commit-bot: I haz the power, 2015-03-08 05:04:39]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/990533002/1

[commit-bot: I haz the power, 2015-03-08 06:07:23]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-03-08 06:08:01]

Patchset 1 (id:??) landed as
https://crrev.com/9e0fb50a74c11981a86c18ad507ece44735b3b98
Cr-Commit-Position: refs/heads/master@{#319581}