Add a merely pass-through QuicMultipathSentPacketManager. Protected behind blocked flag FLAGS_quic_…

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 281 matching lines @@
     RETURN_STRING_LITERAL(QUIC_BAD_MULTIPATH_FLAG);
     RETURN_STRING_LITERAL(QUIC_IP_ADDRESS_CHANGED);
     RETURN_STRING_LITERAL(QUIC_CONNECTION_MIGRATION_NO_MIGRATABLE_STREAMS);
     RETURN_STRING_LITERAL(QUIC_CONNECTION_MIGRATION_TOO_MANY_CHANGES);
     RETURN_STRING_LITERAL(QUIC_CONNECTION_MIGRATION_NO_NEW_NETWORK);
     RETURN_STRING_LITERAL(QUIC_CONNECTION_MIGRATION_NON_MIGRATABLE_STREAM);
     RETURN_STRING_LITERAL(QUIC_TOO_MANY_RTOS);
     RETURN_STRING_LITERAL(QUIC_ATTEMPT_TO_SEND_UNENCRYPTED_STREAM_DATA);
     RETURN_STRING_LITERAL(QUIC_MAYBE_CORRUPTED_MEMORY);
     RETURN_STRING_LITERAL(QUIC_CRYPTO_CHLO_TOO_LARGE);
+    RETURN_STRING_LITERAL(QUIC_MULTIPATH_PATH_DOES_NOT_EXIST);
+    RETURN_STRING_LITERAL(QUIC_MULTIPATH_PATH_NOT_ACTIVE);
     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 250 matching lines @@
 
     bytes_remaining -= line_bytes;
     offset += line_bytes;
     p += line_bytes;
     s += '\n';
   }
   return s;
 }
 
 }  // namespace net