Standardize usage of virtual/override/final in chrome/browser/extensions/

chrome/browser/extensions/api/easy_unlock_private/easy_unlock_private_crypto_delegate_stub.cc

Index: chrome/browser/extensions/api/easy_unlock_private/easy_unlock_private_crypto_delegate_stub.cc
diff --git a/chrome/browser/extensions/api/easy_unlock_private/easy_unlock_private_crypto_delegate_stub.cc b/chrome/browser/extensions/api/easy_unlock_private/easy_unlock_private_crypto_delegate_stub.cc
index 126a5d98568eeac6b32121d6b8f3eac7b7a0aefe..5869930bbc02243ddc01cbad3d670219413a304a 100644
--- a/chrome/browser/extensions/api/easy_unlock_private/easy_unlock_private_crypto_delegate_stub.cc
+++ b/chrome/browser/extensions/api/easy_unlock_private/easy_unlock_private_crypto_delegate_stub.cc
@@ -15,25 +15,25 @@ class EasyUnlockPrivateCryptoDelegateStub
  public:
   EasyUnlockPrivateCryptoDelegateStub() {}
 
-  virtual ~EasyUnlockPrivateCryptoDelegateStub() {}
+  ~EasyUnlockPrivateCryptoDelegateStub() override {}
 
-  virtual void GenerateEcP256KeyPair(const KeyPairCallback& callback) override {
+  void GenerateEcP256KeyPair(const KeyPairCallback& callback) override {
     callback.Run("", "");
   }
 
-  virtual void PerformECDHKeyAgreement(
+  void PerformECDHKeyAgreement(
       const easy_unlock_private::PerformECDHKeyAgreement::Params& params,
       const DataCallback& callback) override {
     callback.Run("");
   }
 
-  virtual void CreateSecureMessage(
+  void CreateSecureMessage(
       const easy_unlock_private::CreateSecureMessage::Params& params,
       const DataCallback& callback) override {
     callback.Run("");
   }
 
-  virtual void UnwrapSecureMessage(
+  void UnwrapSecureMessage(
       const easy_unlock_private::UnwrapSecureMessage::Params& params,
       const DataCallback& callback) override {
     callback.Run("");