QUIC - (no behavior change) s/NULL/nullptr/g in .../quic/...

net/quic/quic_sent_packet_manager.h

Index: net/quic/quic_sent_packet_manager.h
diff --git a/net/quic/quic_sent_packet_manager.h b/net/quic/quic_sent_packet_manager.h
index dde6e9801f988b601a786c081f918de61e72e0f2..2b5f738b25c7aec145cc985a54526e62a4c12a92 100644
--- a/net/quic/quic_sent_packet_manager.h
+++ b/net/quic/quic_sent_packet_manager.h
@@ -327,11 +327,11 @@ class NET_EXPORT_PRIVATE QuicSentPacketManager {
   // Newly serialized retransmittable and fec packets are added to this map,
   // which contains owning pointers to any contained frames.  If a packet is
   // retransmitted, this map will contain entries for both the old and the new
-  // packet. The old packet's retransmittable frames entry will be NULL, while
-  // the new packet's entry will contain the frames to retransmit.
+  // packet. The old packet's retransmittable frames entry will be nullptr,
+  // while the new packet's entry will contain the frames to retransmit.
   // If the old packet is acked before the new packet, then the old entry will
   // be removed from the map and the new entry's retransmittable frames will be
-  // set to NULL.
+  // set to nullptr.
   QuicUnackedPacketMap unacked_packets_;
 
   // Pending retransmissions which have not been packetized and sent yet.