Land recent QUIC changes.

Count the number of retransmissions for a packet due to RTO and explicit nacks and implement exponential backoff based on number of retransmissions.

Merge internal change: 41823946

QuicConnection now packetizes acks and congestion control frames even more lazily and packs control frames with up to 1 stream frame.

Merge internal change: 41805161

Remove nitty-gritties of QuicFramer from QuicTimeWaitListManager and remove some static methods from QuicFramer.

Merge internal change: 41795314

Store socket addresses in QuicConnection.h instead of pushing it down to QuicFramer.h and getting it back from there.

Merge internal change: 41768211

Retransmit largest_observed_ packet if its missing.

Merge internal change: 41743584

Split framer packet creation into size determination and packet creation methods in order to ensure the maximum number of frames are fit into a single packet.

Merge internal change: 41702016

Handle packet reordering for queued packets.

Merge internal change: 41701179

Bug fix for retransmission order.

Merge internal change: 41638847

Adding basic dispatcher stats for QUIC

Merge internal change: 41630921

Minor fixes in quic_connection.cc

Merge internal change: 41610652

Use priority queue to maintain the list of sequence numbers to be retransmitted. This will enable us to do an exponential backoff for lost packets.

Merge internal change: 41582526

Adding DISALLOW_COPY_AND_ASSIGN to all congestion control classes that were missing it. And a few nits.

Merge internal change: 41580553

Break circular dependency between quic_protocol.h and quic_bandwidth.h

Merge internal change: 41578776

Fix uninitialized memory access in quic_framer_test.

Merge internal change: 41558816

Cleanup, consolidated quic_send_scheduler with quic_congestion_manager

Merge internal change: 41549823

Set the retransmit alarm only when we successfully write the packet to the socket instead of setting it when we attempt to write.

Merge internal change: 41547192

Introduced QuicByteCount and moved TCP receive_bytes packing to QuicFramer where it belongs.

Merge internal change: 41546840

Fix a bug with how FEC groups were being created in QUIC.  Now opening multiple and always closing the group.

Merge internal change: 41538221

Removing QUIC logspam

Merge internal change: 41537896

Exposing ReadPublicHeader and ReadPublicResetPacket static methods which don't take a dependency on reader_(unlike Process..() methods).

Merge internal change: 41535886

Use "test" not "testing" for test namespaces to be consistent with other QUIC code.

Merge internal change: 41534488

Fix a number of minor issues that came up in landing recent chrome changes.

Merge internal change: 41531793

Removed the QuicReceiptMetricsCollector and started using the ReceiveAlgorithmInterface directly in the CongestionManager. The QuicReceiptMetricsCollector did not provide any functionality.

Merge internal change: 41486246

Integrating new quic bandwidth class

Merge internal change: 41473682

R=jar@chromium.org
BUG=


Review URL: https://chromiumcodereview.appspot.com/12145002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@180299 0039d316-1c4b-4281-b951-d872f2087c98

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