Remove obsolete fields in quic_protocol and their current usage in QUIC. Reorders QuicAckFrame fie…

net/quic/quic_framer.cc

Index: net/quic/quic_framer.cc
diff --git a/net/quic/quic_framer.cc b/net/quic/quic_framer.cc
index cb32e3d5021b2bc7190c2b9fac714d4fe29cd35e..0ff32cabbd306979ef1653b6763a9b17a238255a 100644
--- a/net/quic/quic_framer.cc
+++ b/net/quic/quic_framer.cc
@@ -1112,7 +1112,6 @@ bool QuicFramer::ProcessAuthenticatedHeader(QuicDataReader* reader,
   header->fec_flag = (private_flags & PACKET_PRIVATE_FLAGS_FEC) != 0;
 
   if ((private_flags & PACKET_PRIVATE_FLAGS_FEC_GROUP) != 0) {
-    header->is_in_fec_group = IN_FEC_GROUP;
     uint8_t first_fec_protected_packet_offset;
     if (!reader->ReadBytes(&first_fec_protected_packet_offset, 1)) {
       set_detailed_error("Unable to read first fec protected packet offset.");
@@ -1124,8 +1123,6 @@ bool QuicFramer::ProcessAuthenticatedHeader(QuicDataReader* reader,
           "than the packet number.");
       return RaiseError(QUIC_INVALID_PACKET_HEADER);
     }
-    header->fec_group =
-        header->packet_number - first_fec_protected_packet_offset;
   }
 
   header->entropy_hash = GetPacketEntropyHash(*header);