Standardize usage of virtual/override/final in extensions/

extensions/browser/extension_prefs.h

Index: extensions/browser/extension_prefs.h
diff --git a/extensions/browser/extension_prefs.h b/extensions/browser/extension_prefs.h
index 2a1caac58ac67918c81813ddcfe508e620491603..cdfb278d35963e8b7b0de81dfbc8b20eb1e93d4a 100644
--- a/extensions/browser/extension_prefs.h
+++ b/extensions/browser/extension_prefs.h
@@ -149,7 +149,7 @@ class ExtensionPrefs : public ExtensionScopedPrefs, public KeyedService {
       const std::vector<ExtensionPrefsObserver*>& early_observers,
       scoped_ptr<TimeProvider> time_provider);
 
-  virtual ~ExtensionPrefs();
+  ~ExtensionPrefs() override;
 
   // Convenience function to get the ExtensionPrefs for a BrowserContext.
   static ExtensionPrefs* Get(content::BrowserContext* context);
@@ -218,35 +218,34 @@ class ExtensionPrefs : public ExtensionScopedPrefs, public KeyedService {
   void GetExtensions(ExtensionIdList* out);
 
   // ExtensionScopedPrefs methods:
-  virtual void UpdateExtensionPref(const std::string& id,
-                                   const std::string& key,
-                                   base::Value* value) override;
+  void UpdateExtensionPref(const std::string& id,
+                           const std::string& key,
+                           base::Value* value) override;
 
-  virtual void DeleteExtensionPrefs(const std::string& id) override;
+  void DeleteExtensionPrefs(const std::string& id) override;
 
-  virtual bool ReadPrefAsBoolean(const std::string& extension_id,
-                                 const std::string& pref_key,
-                                 bool* out_value) const override;
+  bool ReadPrefAsBoolean(const std::string& extension_id,
+                         const std::string& pref_key,
+                         bool* out_value) const override;
 
-  virtual bool ReadPrefAsInteger(const std::string& extension_id,
-                                 const std::string& pref_key,
-                                 int* out_value) const override;
+  bool ReadPrefAsInteger(const std::string& extension_id,
+                         const std::string& pref_key,
+                         int* out_value) const override;
 
-  virtual bool ReadPrefAsString(const std::string& extension_id,
-                                const std::string& pref_key,
-                                std::string* out_value) const override;
+  bool ReadPrefAsString(const std::string& extension_id,
+                        const std::string& pref_key,
+                        std::string* out_value) const override;
 
-  virtual bool ReadPrefAsList(const std::string& extension_id,
-                              const std::string& pref_key,
-                              const base::ListValue** out_value) const override;
+  bool ReadPrefAsList(const std::string& extension_id,
+                      const std::string& pref_key,
+                      const base::ListValue** out_value) const override;
 
-  virtual bool ReadPrefAsDictionary(
+  bool ReadPrefAsDictionary(
       const std::string& extension_id,
       const std::string& pref_key,
       const base::DictionaryValue** out_value) const override;
 
-  virtual bool HasPrefForExtension(const std::string& extension_id) const
-      override;
+  bool HasPrefForExtension(const std::string& extension_id) const override;
 
   // Did the extension ask to escalate its permission during an upgrade?
   bool DidExtensionEscalatePermissions(const std::string& id);