Standardize usage of virtual/override/final in net/

net/quic/quic_reliable_client_stream.h

Index: net/quic/quic_reliable_client_stream.h
diff --git a/net/quic/quic_reliable_client_stream.h b/net/quic/quic_reliable_client_stream.h
index 065db9e7139b40431e69885ee612203f1a223408..9ed66013467526e6c347a123e0167d293f9a37f6 100644
--- a/net/quic/quic_reliable_client_stream.h
+++ b/net/quic/quic_reliable_client_stream.h
@@ -51,13 +51,13 @@ class NET_EXPORT_PRIVATE QuicReliableClientStream : public QuicDataStream {
                            QuicSession* session,
                            const BoundNetLog& net_log);
 
-  virtual ~QuicReliableClientStream();
+  ~QuicReliableClientStream() override;
 
   // QuicDataStream
-  virtual uint32 ProcessData(const char* data, uint32 data_len) override;
-  virtual void OnFinRead() override;
-  virtual void OnCanWrite() override;
-  virtual QuicPriority EffectivePriority() const override;
+  uint32 ProcessData(const char* data, uint32 data_len) override;
+  void OnFinRead() override;
+  void OnCanWrite() override;
+  QuicPriority EffectivePriority() const override;
 
   // While the server's set_priority shouldn't be called externally, the creator
   // of client-side streams should be able to set the priority.