API changes to Write path Session on down for FEC protection.

net/quic/quic_protocol.h

 // 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.
 
 #ifndef NET_QUIC_QUIC_PROTOCOL_H_
 #define NET_QUIC_QUIC_PROTOCOL_H_
 
 #include <stddef.h>
 #include <limits>
 #include <map>
@@ skipping 137 matching lines @@
 enum HasRetransmittableData {
   NO_RETRANSMITTABLE_DATA,
   HAS_RETRANSMITTABLE_DATA,
 };
 
 enum IsHandshake {
   NOT_HANDSHAKE,
   IS_HANDSHAKE
 };
 
+// Indicates FEC protection level for data being written.
+enum FecProtection {
+  MUST_FEC_PROTECT,  // Callee must FEC protect this data.
+  MAY_FEC_PROTECT  // Callee does not have to but may FEC protect this data.
+};
+
 enum QuicFrameType {
   // Regular frame types. The values set here cannot change without the
   // introduction of a new QUIC version.
   PADDING_FRAME = 0,
   RST_STREAM_FRAME = 1,
   CONNECTION_CLOSE_FRAME = 2,
   GOAWAY_FRAME = 3,
   WINDOW_UPDATE_FRAME = 4,
   BLOCKED_FRAME = 5,
   STOP_WAITING_FRAME = 6,
@@ skipping 881 matching lines @@
   // Stores the sequence numbers of all transmissions of this packet.
   // Can never be null.
   SequenceNumberSet* all_transmissions;
   // In flight packets have not been abandoned or lost.
   bool in_flight;
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_PROTOCOL_H_