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

net/quic/quic_connection_stats.cc

 // 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.
 
 #include "net/quic/quic_connection_stats.h"
 
 using std::ostream;
 
 namespace net {
 
 QuicConnectionStats::QuicConnectionStats()
     : bytes_sent(0),
       packets_sent(0),
       stream_bytes_sent(0),
       packets_discarded(0),
       bytes_received(0),
       packets_received(0),
       packets_processed(0),
       stream_bytes_received(0),
       bytes_retransmitted(0),
       packets_retransmitted(0),
       bytes_spuriously_retransmitted(0),
       packets_spuriously_retransmitted(0),
       packets_lost(0),
       slowstart_packets_sent(0),
       slowstart_packets_lost(0),
-      packets_revived(0),
       packets_dropped(0),
       crypto_retransmit_count(0),
       loss_timeout_count(0),
       tlp_count(0),
       rto_count(0),
       min_rtt_us(0),
       srtt_us(0),
       max_packet_size(0),
       max_received_packet_size(0),
       estimated_bandwidth(QuicBandwidth::Zero()),
       packets_reordered(0),
       max_sequence_reordering(0),
       max_time_reordering_us(0),
       tcp_loss_events(0),
       connection_creation_time(QuicTime::Zero()) {}
 
 QuicConnectionStats::QuicConnectionStats(const QuicConnectionStats& other) =
     default;
 
 QuicConnectionStats::~QuicConnectionStats() {}
 
 }  // namespace net