Change the null value for packet sequence numbers to

net/quic/quic_fec_group.h

Index: net/quic/quic_fec_group.h
diff --git a/net/quic/quic_fec_group.h b/net/quic/quic_fec_group.h
index 718d09f83ad6a1008d9061e35bc815ba9fdebb0c..a44565fb3458fe5774395467f54f3ffc243b5fc3 100644
--- a/net/quic/quic_fec_group.h
+++ b/net/quic/quic_fec_group.h
@@ -61,7 +61,7 @@ class NET_EXPORT_PRIVATE QuicFecGroup {
     return min_protected_packet_;
   }
 
-  size_t NumReceivedPackets() const {
+  QuicPacketCount NumReceivedPackets() const {
     return received_packets_.size();
   }
 
@@ -72,9 +72,9 @@ class NET_EXPORT_PRIVATE QuicFecGroup {
 
  private:
   bool UpdateParity(base::StringPiece payload);
-  // Returns the number of missing packets, or size_t max if the number
-  // of missing packets is not known.
-  size_t NumMissingPackets() const;
+  // Returns the number of missing packets, or QuicPacketCount max
+  // if the number of missing packets is not known.
+  QuicPacketCount NumMissingPackets() const;
 
   // Set of packets that we have recevied.
   SequenceNumberSet received_packets_;