relnote: Remove remaining now unused FEC code from QUIC. Merge internal change: 135007563

net/quic/core/quic_framer.cc

Index: net/quic/core/quic_framer.cc
diff --git a/net/quic/core/quic_framer.cc b/net/quic/core/quic_framer.cc
index b11a52f6ff07ac8712f6c0e95318369a1db5a3ea..4bfe7254e831626bbdec22d80fd75b89024e87bb 100644
--- a/net/quic/core/quic_framer.cc
+++ b/net/quic/core/quic_framer.cc
@@ -643,7 +643,6 @@ bool QuicFramer::ProcessDataPacket(QuicDataReader* encrypted_reader,
     return RaiseError(QUIC_PACKET_TOO_LARGE);
   }
 
-  DCHECK(!header.fec_flag);
   // Handle the payload.
   if (!ProcessFrameData(&reader, header)) {
     DCHECK_NE(QUIC_NO_ERROR, error_);  // ProcessFrameData sets the error.
@@ -1102,28 +1101,12 @@ bool QuicFramer::ProcessAuthenticatedHeader(QuicDataReader* reader,
     return RaiseError(QUIC_INVALID_PACKET_HEADER);
   }
 
-  if (private_flags > PACKET_PRIVATE_FLAGS_MAX_VERSION_32) {
+  if (private_flags > PACKET_PRIVATE_FLAGS_MAX) {
     set_detailed_error("Illegal private flags value.");
     return RaiseError(QUIC_INVALID_PACKET_HEADER);
   }
 
   header->entropy_flag = (private_flags & PACKET_PRIVATE_FLAGS_ENTROPY) != 0;
-  header->fec_flag = (private_flags & PACKET_PRIVATE_FLAGS_FEC) != 0;
-
-  if ((private_flags & PACKET_PRIVATE_FLAGS_FEC_GROUP) != 0) {
-    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.");
-      return RaiseError(QUIC_INVALID_PACKET_HEADER);
-    }
-    if (first_fec_protected_packet_offset >= header->packet_number) {
-      set_detailed_error(
-          "First fec protected packet offset must be less "
-          "than the packet number.");
-      return RaiseError(QUIC_INVALID_PACKET_HEADER);
-    }
-  }
-
   header->entropy_hash = GetPacketEntropyHash(*header);
   return true;
 }