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

net/quic/crypto/null_decrypter.cc

Index: net/quic/crypto/null_decrypter.cc
diff --git a/net/quic/crypto/null_decrypter.cc b/net/quic/crypto/null_decrypter.cc
index c58e7b07c0b2ccac87cc1bb9394d7f8ebbac7e31..77aee4c8152f4621bd6f3bc3db970e6c4469261f 100644
--- a/net/quic/crypto/null_decrypter.cc
+++ b/net/quic/crypto/null_decrypter.cc
@@ -53,7 +53,7 @@ QuicData* NullDecrypter::DecryptPacket(QuicPacketSequenceNumber /*seq_number*/,
 
   uint128 hash;
   if (!ReadHash(&reader, &hash)) {
-    return NULL;
+    return nullptr;
   }
 
   StringPiece plaintext = reader.ReadRemainingPayload();
@@ -63,7 +63,7 @@ QuicData* NullDecrypter::DecryptPacket(QuicPacketSequenceNumber /*seq_number*/,
   plaintext.AppendToString(&buffer);
 
   if (hash != ComputeHash(buffer)) {
-    return NULL;
+    return nullptr;
   }
   return new QuicData(plaintext.data(), plaintext.length());
 }