Changes QUIC's SentPacketManager to pass in HAS_RETRANSMITTABLE_DATA to

net/quic/quic_sent_packet_manager.h

 // Copyright 2013 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_SENT_PACKET_MANAGER_H_
 #define NET_QUIC_QUIC_SENT_PACKET_MANAGER_H_
 
 #include <map>
 #include <set>
 #include <utility>
@@ skipping 93 matching lines @@
   void SetHandshakeConfirmed() { handshake_confirmed_ = true; }
 
   // Processes the incoming ack.
   void OnIncomingAck(const QuicAckFrame& ack_frame,
                      QuicTime ack_receive_time);
 
   // Returns true if the non-FEC packet |sequence_number| is unacked.
   bool IsUnacked(QuicPacketSequenceNumber sequence_number) const;
 
   // Requests retransmission of all unacked packets of |retransmission_type|.
+  // The behavior of this method depends on the value of |retransmission_type|:
+  // ALL_UNACKED_RETRANSMISSION - All unacked packets will be retransmitted.
+  // This can happen, for example, after a version negotiation packet has been
+  // received and all packets needs to be retransmitted with the new version.
+  // ALL_INITIAL_RETRANSMISSION - Only initially encrypted packets will be
+  // retransmitted. This can happen, for example, when a CHLO has been rejected
+  // and the previously encrypted data needs to be encrypted with a new key.
   void RetransmitUnackedPackets(TransmissionType retransmission_type);
 
   // Retransmits the oldest pending packet there is still a tail loss probe
   // pending.  Invoked after OnRetransmissionTimeout.
   bool MaybeRetransmitTailLossProbe();
 
   // Removes the retransmittable frames from all unencrypted packets to ensure
   // they don't get retransmitted.
   void NeuterUnencryptedPackets();
 
@@ skipping 268 matching lines @@
   // Records bandwidth from server to client in normal operation, over periods
   // of time with no loss events.
   QuicSustainedBandwidthRecorder sustained_bandwidth_recorder_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicSentPacketManager);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_SENT_PACKET_MANAGER_H_