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

chrome/browser/extensions/api/storage/managed_value_store_cache.cc

Index: chrome/browser/extensions/api/storage/managed_value_store_cache.cc
diff --git a/chrome/browser/extensions/api/storage/managed_value_store_cache.cc b/chrome/browser/extensions/api/storage/managed_value_store_cache.cc
index 245412687dc17f446159e40a18e2b70b94b65e60..2d3b0ccdfc31a6a09cd83aedeb59b5342ae5bb2e 100644
--- a/chrome/browser/extensions/api/storage/managed_value_store_cache.cc
+++ b/chrome/browser/extensions/api/storage/managed_value_store_cache.cc
@@ -68,20 +68,18 @@ class ManagedValueStoreCache::ExtensionTracker
     : public ExtensionRegistryObserver {
  public:
   explicit ExtensionTracker(Profile* profile);
-  virtual ~ExtensionTracker() {}
+  ~ExtensionTracker() override {}
 
  private:
   // ExtensionRegistryObserver implementation.
-  virtual void OnExtensionWillBeInstalled(
-      content::BrowserContext* browser_context,
-      const Extension* extension,
-      bool is_update,
-      bool from_ephemeral,
-      const std::string& old_name) override;
-  virtual void OnExtensionUninstalled(
-      content::BrowserContext* browser_context,
-      const Extension* extension,
-      extensions::UninstallReason reason) override;
+  void OnExtensionWillBeInstalled(content::BrowserContext* browser_context,
+                                  const Extension* extension,
+                                  bool is_update,
+                                  bool from_ephemeral,
+                                  const std::string& old_name) override;
+  void OnExtensionUninstalled(content::BrowserContext* browser_context,
+                              const Extension* extension,
+                              extensions::UninstallReason reason) override;
 
   // Handler for the signal from ExtensionSystem::ready().
   void OnExtensionsReady();