diff --git a/quic/core/congestion_control/bbr_sender.cc b/quic/core/congestion_control/bbr_sender.cc
index 858e57d..ef06cbf 100644
--- a/quic/core/congestion_control/bbr_sender.cc
+++ b/quic/core/congestion_control/bbr_sender.cc
@@ -187,7 +187,7 @@
   return bytes_in_flight < GetCongestionWindow();
 }
 
-QuicBandwidth BbrSender::PacingRate(QuicByteCount bytes_in_flight) const {
+QuicBandwidth BbrSender::PacingRate(QuicByteCount /*bytes_in_flight*/) const {
   if (pacing_rate_.IsZero()) {
     return high_gain_ * QuicBandwidth::FromBytesAndTimeDelta(
                             initial_congestion_window_, GetMinRtt());
diff --git a/quic/core/congestion_control/bbr_sender.h b/quic/core/congestion_control/bbr_sender.h
index b559134..5534144 100644
--- a/quic/core/congestion_control/bbr_sender.h
+++ b/quic/core/congestion_control/bbr_sender.h
@@ -110,7 +110,7 @@
   void AdjustNetworkParameters(QuicBandwidth bandwidth,
                                QuicTime::Delta rtt,
                                bool allow_cwnd_to_decrease) override;
-  void SetNumEmulatedConnections(int num_connections) override {}
+  void SetNumEmulatedConnections(int /*num_connections*/) override {}
   void SetInitialCongestionWindowInPackets(
       QuicPacketCount congestion_window) override;
   void OnCongestionEvent(bool rtt_updated,
@@ -123,7 +123,7 @@
                     QuicPacketNumber packet_number,
                     QuicByteCount bytes,
                     HasRetransmittableData is_retransmittable) override;
-  void OnRetransmissionTimeout(bool packets_retransmitted) override {}
+  void OnRetransmissionTimeout(bool /*packets_retransmitted*/) override {}
   void OnConnectionMigration() override {}
   bool CanSend(QuicByteCount bytes_in_flight) override;
   QuicBandwidth PacingRate(QuicByteCount bytes_in_flight) const override;
diff --git a/quic/core/congestion_control/rtt_stats.cc b/quic/core/congestion_control/rtt_stats.cc
index 40b4bcc..06bc60b 100644
--- a/quic/core/congestion_control/rtt_stats.cc
+++ b/quic/core/congestion_control/rtt_stats.cc
@@ -41,7 +41,7 @@
 // Updates the RTT based on a new sample.
 void RttStats::UpdateRtt(QuicTime::Delta send_delta,
                          QuicTime::Delta ack_delay,
-                         QuicTime now) {
+                         QuicTime /*now*/) {
   if (send_delta.IsInfinite() || send_delta <= QuicTime::Delta::Zero()) {
     QUIC_LOG_FIRST_N(WARNING, 3)
         << "Ignoring measured send_delta, because it's is "
diff --git a/quic/core/congestion_control/tcp_cubic_sender_bytes.cc b/quic/core/congestion_control/tcp_cubic_sender_bytes.cc
index 7cbf332..28f284e 100644
--- a/quic/core/congestion_control/tcp_cubic_sender_bytes.cc
+++ b/quic/core/congestion_control/tcp_cubic_sender_bytes.cc
@@ -261,7 +261,8 @@
   return "";
 }
 
-void TcpCubicSenderBytes::OnApplicationLimited(QuicByteCount bytes_in_flight) {}
+void TcpCubicSenderBytes::OnApplicationLimited(
+    QuicByteCount /*bytes_in_flight*/) {}
 
 void TcpCubicSenderBytes::SetCongestionWindowFromBandwidthAndRtt(
     QuicBandwidth bandwidth,
@@ -360,7 +361,7 @@
 // Called when we receive an ack. Normal TCP tracks how many packets one ack
 // represents, but quic has a separate ack for each packet.
 void TcpCubicSenderBytes::MaybeIncreaseCwnd(
-    QuicPacketNumber acked_packet_number,
+    QuicPacketNumber /*acked_packet_number*/,
     QuicByteCount acked_bytes,
     QuicByteCount prior_in_flight,
     QuicTime event_time) {
diff --git a/quic/core/congestion_control/tcp_cubic_sender_bytes_test.cc b/quic/core/congestion_control/tcp_cubic_sender_bytes_test.cc
index 32451a5..2d27896 100644
--- a/quic/core/congestion_control/tcp_cubic_sender_bytes_test.cc
+++ b/quic/core/congestion_control/tcp_cubic_sender_bytes_test.cc
@@ -64,7 +64,7 @@
     return SendAvailableSendWindow(kDefaultTCPMSS);
   }
 
-  int SendAvailableSendWindow(QuicPacketLength packet_length) {
+  int SendAvailableSendWindow(QuicPacketLength /*packet_length*/) {
     // Send as long as TimeUntilSend returns Zero.
     int packets_sent = 0;
     bool can_send = sender_->CanSend(bytes_in_flight_);