Standardize usage of virtual/override/final in base/

base/prefs/testing_pref_store.h

Index: base/prefs/testing_pref_store.h
diff --git a/base/prefs/testing_pref_store.h b/base/prefs/testing_pref_store.h
index aa2bd801eb96c2c880e7cf19d449e0b14ced707b..866b4aeb029c6a5aaf64e5e4401f58535f731c82 100644
--- a/base/prefs/testing_pref_store.h
+++ b/base/prefs/testing_pref_store.h
@@ -21,26 +21,24 @@ class TestingPrefStore : public PersistentPrefStore {
   TestingPrefStore();
 
   // Overriden from PrefStore.
-  virtual bool GetValue(const std::string& key,
-                        const base::Value** result) const override;
-  virtual void AddObserver(PrefStore::Observer* observer) override;
-  virtual void RemoveObserver(PrefStore::Observer* observer) override;
-  virtual bool HasObservers() const override;
-  virtual bool IsInitializationComplete() const override;
+  bool GetValue(const std::string& key,
+                const base::Value** result) const override;
+  void AddObserver(PrefStore::Observer* observer) override;
+  void RemoveObserver(PrefStore::Observer* observer) override;
+  bool HasObservers() const override;
+  bool IsInitializationComplete() const override;
 
   // PersistentPrefStore overrides:
-  virtual bool GetMutableValue(const std::string& key,
-                               base::Value** result) override;
-  virtual void ReportValueChanged(const std::string& key) override;
-  virtual void SetValue(const std::string& key, base::Value* value) override;
-  virtual void SetValueSilently(const std::string& key,
-                                base::Value* value) override;
-  virtual void RemoveValue(const std::string& key) override;
-  virtual bool ReadOnly() const override;
-  virtual PrefReadError GetReadError() const override;
-  virtual PersistentPrefStore::PrefReadError ReadPrefs() override;
-  virtual void ReadPrefsAsync(ReadErrorDelegate* error_delegate) override;
-  virtual void CommitPendingWrite() override;
+  bool GetMutableValue(const std::string& key, base::Value** result) override;
+  void ReportValueChanged(const std::string& key) override;
+  void SetValue(const std::string& key, base::Value* value) override;
+  void SetValueSilently(const std::string& key, base::Value* value) override;
+  void RemoveValue(const std::string& key) override;
+  bool ReadOnly() const override;
+  PrefReadError GetReadError() const override;
+  PersistentPrefStore::PrefReadError ReadPrefs() override;
+  void ReadPrefsAsync(ReadErrorDelegate* error_delegate) override;
+  void CommitPendingWrite() override;
 
   // Marks the store as having completed initialization.
   void SetInitializationCompleted();
@@ -72,7 +70,7 @@ class TestingPrefStore : public PersistentPrefStore {
   bool committed() { return committed_; }
 
  protected:
-  virtual ~TestingPrefStore();
+  ~TestingPrefStore() override;
 
  private:
   // Stores the preference values.