Fix the semantics of QuicFecGroup::ProtectsPacketsBefore into IsWaitingForPacketBefore. Certain ed…

net/quic/quic_fec_group_interface.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.
 //
 // Tracks information about an FEC group, including the packets
 // that have been seen, and the running parity.  Provides the ability
 // to revive a dropped packet.
 
 #ifndef NET_QUIC_QUIC_FEC_GROUP_INTERFACE_H_
 #define NET_QUIC_QUIC_FEC_GROUP_INTERFACE_H_
@@ skipping 32 matching lines @@
   virtual bool IsFinished() const = 0;
 
   // Revives the missing packet from this FEC group.  This may return a packet
   // that is null padded to a greater length than the original packet, but
   // the framer will handle it correctly.  Returns the length of the data
   // written to |decrypted_payload|, or 0 if the packet could not be revived.
   virtual size_t Revive(QuicPacketHeader* header,
                         char* decrypted_payload,
                         size_t decrypted_payload_len) = 0;
 
-  // Returns true of this FEC group protects any packets with sequence
-  // numbers less than |num|.
-  virtual bool ProtectsPacketsBefore(QuicPacketNumber num) const = 0;
+  // Returns true if the group is waiting for any packets with sequence numbers
+  // less than |num|.
+  virtual bool IsWaitingForPacketBefore(QuicPacketNumber num) const = 0;
 
   // The FEC data in the FEC packet.
   virtual const base::StringPiece PayloadParity() const = 0;
 
   // The FEC group number to be used on the FEC packet.
   virtual QuicPacketNumber MinProtectedPacket() const = 0;
 
   // Number of packets in the group.
   virtual QuicPacketCount NumReceivedPackets() const = 0;
 
   // Returns the effective encryption level of the FEC group.
   virtual EncryptionLevel EffectiveEncryptionLevel() const = 0;
 
   // An optimized version of running |output| ^= |input|, where ^ is
   // byte-by-byte XOR and both |output| and |input| are of size |size_in_bytes|.
   static void XorBuffers(const char* input, size_t size_in_bytes, char* output);
 
  protected:
   QuicFecGroupInterface() {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(QuicFecGroupInterface);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_FEC_GROUP_INTERFACE_H_