Standardize usage of virtual/override/final in extensions/

extensions/browser/api/storage/weak_unlimited_settings_storage.h

Index: extensions/browser/api/storage/weak_unlimited_settings_storage.h
diff --git a/extensions/browser/api/storage/weak_unlimited_settings_storage.h b/extensions/browser/api/storage/weak_unlimited_settings_storage.h
index c22b5fedf87f2a970c73d84f4ebbb1c2692d4c67..94212877eced2e3d88ae3c62da68ad503152d7f0 100644
--- a/extensions/browser/api/storage/weak_unlimited_settings_storage.h
+++ b/extensions/browser/api/storage/weak_unlimited_settings_storage.h
@@ -18,26 +18,25 @@ class WeakUnlimitedSettingsStorage : public ValueStore {
   // Ownership of |delegate| NOT taken.
   explicit WeakUnlimitedSettingsStorage(ValueStore* delegate);
 
-  virtual ~WeakUnlimitedSettingsStorage();
+  ~WeakUnlimitedSettingsStorage() override;
 
   // ValueStore implementation.
-  virtual size_t GetBytesInUse(const std::string& key) override;
-  virtual size_t GetBytesInUse(const std::vector<std::string>& keys) override;
-  virtual size_t GetBytesInUse() override;
-  virtual ReadResult Get(const std::string& key) override;
-  virtual ReadResult Get(const std::vector<std::string>& keys) override;
-  virtual ReadResult Get() override;
-  virtual WriteResult Set(
-      WriteOptions options,
-      const std::string& key,
-      const base::Value& value) override;
-  virtual WriteResult Set(
-      WriteOptions options, const base::DictionaryValue& values) override;
-  virtual WriteResult Remove(const std::string& key) override;
-  virtual WriteResult Remove(const std::vector<std::string>& keys) override;
-  virtual WriteResult Clear() override;
-  virtual bool Restore() override;
-  virtual bool RestoreKey(const std::string& key) override;
+  size_t GetBytesInUse(const std::string& key) override;
+  size_t GetBytesInUse(const std::vector<std::string>& keys) override;
+  size_t GetBytesInUse() override;
+  ReadResult Get(const std::string& key) override;
+  ReadResult Get(const std::vector<std::string>& keys) override;
+  ReadResult Get() override;
+  WriteResult Set(WriteOptions options,
+                  const std::string& key,
+                  const base::Value& value) override;
+  WriteResult Set(WriteOptions options,
+                  const base::DictionaryValue& values) override;
+  WriteResult Remove(const std::string& key) override;
+  WriteResult Remove(const std::vector<std::string>& keys) override;
+  WriteResult Clear() override;
+  bool Restore() override;
+  bool RestoreKey(const std::string& key) override;
 
  private:
   // The delegate storage area, NOT OWNED.