Land Recent QUIC changes.

net/quic/quic_packet_creator.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // Accumulates frames for the next packet until more frames no longer fit or
 // it's time to create a packet from them.  Also provides packet creation of
 // FEC packets based on previously created packets.
 
 #ifndef NET_QUIC_QUIC_PACKET_CREATOR_H_
 #define NET_QUIC_QUIC_PACKET_CREATOR_H_
@@ skipping 52 matching lines @@
   // return true if an fec group is open.
   bool ShouldSendFec(bool force_close) const;
 
   // Starts a new FEC group with the next serialized packet, if FEC is enabled
   // and there is not already an FEC group open.
   void MaybeStartFEC();
 
   // Makes the framer not serialize the protocol version in sent packets.
   void StopSendingVersion();
 
+  // Update the sequence number length to use in future packets as soon as it
+  // can be safely changed.
+  void UpdateSequenceNumberLength(
+      QuicPacketSequenceNumber least_packet_awaited_by_peer,
+      QuicByteCount bytes_per_second);
+
   // The overhead the framing will add for a packet with one frame.
   static size_t StreamFramePacketOverhead(
       QuicVersion version,
       QuicGuidLength guid_length,
       bool include_version,
       QuicSequenceNumberLength sequence_number_length,
       InFecGroup is_in_fec_group);
 
   bool HasRoomForStreamFrame(QuicStreamId id, QuicStreamOffset offset) const;
 
@@ skipping 62 matching lines @@
   SerializedPacket SerializeConnectionClose(
       QuicConnectionCloseFrame* close_frame);
 
   // Creates a version negotiation packet which supports |supported_versions|.
   // Caller owns the created  packet. Also, sets the entropy hash of the
   // serialized packet to a random bool and returns that value as a member of
   // SerializedPacket.
   QuicEncryptedPacket* SerializeVersionNegotiationPacket(
       const QuicVersionVector& supported_versions);
 
+  // Sequence number of the last created packet, or 0 if no packets have been
+  // created.
   QuicPacketSequenceNumber sequence_number() const {
     return sequence_number_;
   }
 
   void set_sequence_number(QuicPacketSequenceNumber s) {
     sequence_number_ = s;
   }
 
   Options* options() {
     return &options_;
@@ skipping 34 matching lines @@
   mutable size_t packet_size_;
   QuicFrames queued_frames_;
   scoped_ptr<RetransmittableFrames> queued_retransmittable_frames_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicPacketCreator);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_PACKET_CREATOR_H_