Remove FEC related connection options and update FEC related comment in code base.

net/quic/quic_sent_packet_manager.h

 // Copyright 2013 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.
 
 #ifndef NET_QUIC_QUIC_SENT_PACKET_MANAGER_H_
 #define NET_QUIC_QUIC_SENT_PACKET_MANAGER_H_
 
 #include <stddef.h>
 
 #include <map>
@@ skipping 115 matching lines @@
       const CachedNetworkParameters& cached_network_params,
       bool max_bandwidth_resumption);
 
   void SetNumOpenStreams(size_t num_streams);
 
   void SetHandshakeConfirmed() { handshake_confirmed_ = true; }
 
   // Processes the incoming ack.
   void OnIncomingAck(const QuicAckFrame& ack_frame, QuicTime ack_receive_time);
 
-  // Returns true if the non-FEC packet |packet_number| is unacked.
+  // Returns true if packet |packet_number| is unacked.
   bool IsUnacked(QuicPacketNumber packet_number) const;
 
   // Requests retransmission of all unacked packets of |retransmission_type|.
   // The behavior of this method depends on the value of |retransmission_type|:
   // ALL_UNACKED_RETRANSMISSION - All unacked packets will be retransmitted.
   // This can happen, for example, after a version negotiation packet has been
   // received and all packets needs to be retransmitted with the new version.
   // ALL_INITIAL_RETRANSMISSION - Only initially encrypted packets will be
   // retransmitted. This can happen, for example, when a CHLO has been rejected
   // and the previously encrypted data needs to be encrypted with a new key.
@@ skipping 183 matching lines @@
   void InvokeLossDetection(QuicTime time);
 
   // Invokes OnCongestionEvent if |rtt_updated| is true, there are pending acks,
   // or pending losses.  Clears pending acks and pending losses afterwards.
   // |bytes_in_flight| is the number of bytes in flight before the losses or
   // acks.
   void MaybeInvokeCongestionEvent(bool rtt_updated,
                                   QuicByteCount bytes_in_flight);
 
   // Called when frames of |packet_number| has been received but the packet
-  // itself has not been received by the peer (e.g., packet is revived by FEC).
+  // itself has not been received by the peer. Currently, this method is not
+  // used.
+  // TODO(fayang): Update the comment when multipath sent packet manager is
+  // landed.
   // The packet needs no longer to be retransmitted, but the packet remains
   // pending if it is and the congestion control does not consider the packet
   // acked.
   void MarkPacketNotRetransmittable(QuicPacketNumber packet_number,
                                     QuicTime::Delta ack_delay_time);
 
   // Removes the retransmittability and in flight properties from the packet at
   // |info| due to receipt by the peer.
   void MarkPacketHandled(QuicPacketNumber packet_number,
                          TransmissionInfo* info,
@@ skipping 17 matching lines @@
                                      QuicPacketNumber acked_packet_number);
 
   // Returns mutable TransmissionInfo associated with |packet_number|, which
   // must be unacked.
   TransmissionInfo* GetMutableTransmissionInfo(QuicPacketNumber packet_number);
 
   // Remove any packets no longer needed for retransmission, congestion, or
   // RTT measurement purposes.
   void RemoveObsoletePackets();
 
-  // Newly serialized retransmittable and fec packets are added to this map,
-  // which contains owning pointers to any contained frames.  If a packet is
+  // Newly serialized retransmittable packets are added to this map, which
+  // contains owning pointers to any contained frames.  If a packet is
   // retransmitted, this map will contain entries for both the old and the new
   // packet. The old packet's retransmittable frames entry will be nullptr,
   // while the new packet's entry will contain the frames to retransmit.
   // If the old packet is acked before the new packet, then the old entry will
   // be removed from the map and the new entry's retransmittable frames will be
   // set to nullptr.
   QuicUnackedPacketMap unacked_packets_;
 
   // Pending retransmissions which have not been packetized and sent yet.
   PendingRetransmissionMap pending_retransmissions_;
@@ skipping 56 matching lines @@
   // Records bandwidth from server to client in normal operation, over periods
   // of time with no loss events.
   QuicSustainedBandwidthRecorder sustained_bandwidth_recorder_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicSentPacketManager);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_SENT_PACKET_MANAGER_H_