Revert of relnote: Protect against a QUIC crash bug but logging a DFATAL and

net/quic/quic_utils.cc

 // 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.
 
 #include "net/quic/quic_utils.h"
 
 #include <ctype.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 212 matching lines @@
     RETURN_STRING_LITERAL(QUIC_CRYPTO_SYMMETRIC_KEY_SETUP_FAILED);
     RETURN_STRING_LITERAL(QUIC_CRYPTO_MESSAGE_WHILE_VALIDATING_CLIENT_HELLO);
     RETURN_STRING_LITERAL(QUIC_CRYPTO_UPDATE_BEFORE_HANDSHAKE_COMPLETE);
     RETURN_STRING_LITERAL(QUIC_VERSION_NEGOTIATION_MISMATCH);
     RETURN_STRING_LITERAL(QUIC_TOO_MANY_OUTSTANDING_SENT_PACKETS);
     RETURN_STRING_LITERAL(QUIC_TOO_MANY_OUTSTANDING_RECEIVED_PACKETS);
     RETURN_STRING_LITERAL(QUIC_CONNECTION_CANCELLED);
     RETURN_STRING_LITERAL(QUIC_BAD_PACKET_LOSS_RATE);
     RETURN_STRING_LITERAL(QUIC_PUBLIC_RESETS_POST_HANDSHAKE);
     RETURN_STRING_LITERAL(QUIC_TIMEOUTS_WITH_OPEN_STREAMS);
-    RETURN_STRING_LITERAL(QUIC_FAILED_TO_SERIALIZE_PACKET);
     RETURN_STRING_LITERAL(QUIC_LAST_ERROR);
     // Intentionally have no default case, so we'll break the build
     // if we add errors and don't put them here.
   }
   // Return a default value so that we return this when |error| doesn't match
   // any of the QuicErrorCodes. This can happen when the ConnectionClose
   // frame sent by the peer (attacker) has invalid error code.
   return "INVALID_ERROR_CODE";
 }
 
@@ skipping 97 matching lines @@
   }
   return s;
 }
 
 // static
 QuicPriority QuicUtils::HighestPriority() {
   return QuicWriteBlockedList::kHighestPriority;
 }
 
 }  // namespace net