Minor cleanup of QuicUnackedPacketMap to simplify the implementation of

net/quic/quic_unacked_packet_map.h

 // Copyright 2014 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_UNACKED_PACKET_MAP_H_
 #define NET_QUIC_QUIC_UNACKED_PACKET_MAP_H_
 
 #include "net/base/linked_hash_map.h"
 #include "net/quic/quic_protocol.h"
 
@@ skipping 34 matching lines @@
   // had any retransmittable packets in the first place.
   bool HasRetransmittableFrames(QuicPacketSequenceNumber sequence_number) const;
 
   // Returns true if there are any unacked packets.
   bool HasUnackedPackets() const;
 
   // Returns true if there are any unacked packets which have retransmittable
   // frames.
   bool HasUnackedRetransmittableFrames() const;
 
-  // Returns the number of unacked packets which have retransmittable frames.
-  size_t GetNumRetransmittablePackets() const;
-
   // Returns the largest sequence number that has been sent.
   QuicPacketSequenceNumber largest_sent_packet() const {
     return largest_sent_packet_;
   }
 
   // Returns the sum of the bytes in all pending packets.
   QuicByteCount bytes_in_flight() const {
     return bytes_in_flight_;
   }
 
@@ skipping 77 matching lines @@
   size_t bytes_in_flight_;
   // Number of outstanding crypto handshake packets.
   size_t pending_crypto_packet_count_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicUnackedPacketMap);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_UNACKED_PACKET_MAP_H_