Standardize usage of virtual/override/final in extensions/

extensions/browser/api/storage/weak_unlimited_settings_storage.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef EXTENSIONS_BROWSER_API_STORAGE_WEAK_UNLIMITED_SETTINGS_STORAGE_H_
 #define EXTENSIONS_BROWSER_API_STORAGE_WEAK_UNLIMITED_SETTINGS_STORAGE_H_
 
 #include "base/compiler_specific.h"
 #include "extensions/browser/value_store/value_store.h"
 
 namespace extensions {
 
 // A ValueStore decorator which makes calls through |Set| ignore quota.
 // "Weak" because ownership of the delegate isn't taken; this is designed to be
 // temporarily attached to storage areas.
 class WeakUnlimitedSettingsStorage : public ValueStore {
  public:
   // 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.
   ValueStore* const delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(WeakUnlimitedSettingsStorage);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_API_STORAGE_WEAK_UNLIMITED_SETTINGS_STORAGE_H_