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

net/quic/crypto/quic_decrypter.h

Index: net/quic/crypto/quic_decrypter.h
diff --git a/net/quic/crypto/quic_decrypter.h b/net/quic/crypto/quic_decrypter.h
index 309834930969158c946cdf4585c2c595177ac31f..06c763709613984c59d3164741e437ac7c932d10 100644
--- a/net/quic/crypto/quic_decrypter.h
+++ b/net/quic/crypto/quic_decrypter.h
@@ -52,7 +52,7 @@ class NET_EXPORT_PRIVATE QuicDecrypter {
                        size_t* output_length) = 0;
 
   // Returns a newly created QuicData object containing the decrypted
-  // |ciphertext| or NULL if there is an error. |sequence_number| is
+  // |ciphertext| or nullptr if there is an error. |sequence_number| is
   // appended to the |nonce_prefix| value provided in SetNoncePrefix()
   // to form the nonce.
   // TODO(wtc): add a way for DecryptPacket to report decryption failure due