Standardize usage of virtual/override/final in net/

net/quic/congestion_control/tcp_loss_algorithm.h

Index: net/quic/congestion_control/tcp_loss_algorithm.h
diff --git a/net/quic/congestion_control/tcp_loss_algorithm.h b/net/quic/congestion_control/tcp_loss_algorithm.h
index 201354b45b07496cf5925b8df7ffc680910c4e1e..0b1c995bcfba3e6036d1edaf8912274177d60cee 100644
--- a/net/quic/congestion_control/tcp_loss_algorithm.h
+++ b/net/quic/congestion_control/tcp_loss_algorithm.h
@@ -21,19 +21,19 @@ namespace net {
 class NET_EXPORT_PRIVATE TCPLossAlgorithm : public LossDetectionInterface {
  public:
   TCPLossAlgorithm();
-  virtual ~TCPLossAlgorithm() {}
+  ~TCPLossAlgorithm() override {}
 
-  virtual LossDetectionType GetLossDetectionType() const override;
+  LossDetectionType GetLossDetectionType() const override;
 
   // Uses nack counts to decide when packets are lost.
-  virtual SequenceNumberSet DetectLostPackets(
+  SequenceNumberSet DetectLostPackets(
       const QuicUnackedPacketMap& unacked_packets,
       const QuicTime& time,
       QuicPacketSequenceNumber largest_observed,
       const RttStats& rtt_stats) override;
 
   // Returns a non-zero value when the early retransmit timer is active.
-  virtual QuicTime GetLossTimeout() const override;
+  QuicTime GetLossTimeout() const override;
 
  private:
   QuicTime loss_detection_timeout_;