Standardize usage of virtual/override/final in net/

net/quic/crypto/crypto_framer.cc

Index: net/quic/crypto/crypto_framer.cc
diff --git a/net/quic/crypto/crypto_framer.cc b/net/quic/crypto/crypto_framer.cc
index 3f61115f3c8bbee75263e63cb63c81f4b3028fe8..029ec5303724fd9cff9443248a90d6f7f1faf032 100644
--- a/net/quic/crypto/crypto_framer.cc
+++ b/net/quic/crypto/crypto_framer.cc
@@ -26,10 +26,9 @@ class OneShotVisitor : public CryptoFramerVisitorInterface {
  public:
   OneShotVisitor() : error_(false) {}
 
-  virtual void OnError(CryptoFramer* framer) override { error_ = true; }
+  void OnError(CryptoFramer* framer) override { error_ = true; }
 
-  virtual void OnHandshakeMessage(
-      const CryptoHandshakeMessage& message) override {
+  void OnHandshakeMessage(const CryptoHandshakeMessage& message) override {
     out_.reset(new CryptoHandshakeMessage(message));
   }