Fix QUIC warnings in preparation for enabling them

gfe-relnote: n/a, compilation-only change
PiperOrigin-RevId: 253893322
Change-Id: I15917a1c5b325922850086277cfad5e3b4da20a4
diff --git a/quic/core/quic_packet_creator.h b/quic/core/quic_packet_creator.h
index e9306b3..d2c94ef 100644
--- a/quic/core/quic_packet_creator.h
+++ b/quic/core/quic_packet_creator.h
@@ -52,7 +52,7 @@
     virtual ~DebugDelegate() {}
 
     // Called when a frame has been added to the current packet.
-    virtual void OnFrameAddedToPacket(const QuicFrame& frame) {}
+    virtual void OnFrameAddedToPacket(const QuicFrame& /*frame*/) {}
   };
 
   QuicPacketCreator(QuicConnectionId server_connection_id,