Standardize usage of virtual/override/final in components/

components/ownership/owner_key_util_impl.h

Index: components/ownership/owner_key_util_impl.h
diff --git a/components/ownership/owner_key_util_impl.h b/components/ownership/owner_key_util_impl.h
index 1bd8c2315b2fc02f387b8450effcdbb174ad3733..b6f18a7e353417289d581a97fd20ca4046009f56 100644
--- a/components/ownership/owner_key_util_impl.h
+++ b/components/ownership/owner_key_util_impl.h
@@ -20,16 +20,16 @@ class OWNERSHIP_EXPORT OwnerKeyUtilImpl : public OwnerKeyUtil {
   explicit OwnerKeyUtilImpl(const base::FilePath& public_key_file);
 
   // OwnerKeyUtil implementation:
-  virtual bool ImportPublicKey(std::vector<uint8>* output) override;
+  bool ImportPublicKey(std::vector<uint8>* output) override;
 #if defined(USE_NSS)
   virtual crypto::RSAPrivateKey* FindPrivateKeyInSlot(
       const std::vector<uint8>& key,
       PK11SlotInfo* slot) override;
 #endif  // defined(USE_NSS)
-  virtual bool IsPublicKeyPresent() override;
+  bool IsPublicKeyPresent() override;
 
  private:
-  virtual ~OwnerKeyUtilImpl();
+  ~OwnerKeyUtilImpl() override;
 
   // The file that holds the public key.
   base::FilePath public_key_file_;