replace OVERRIDE and FINAL with override and final in chrome/browser/extensions/

chrome/browser/extensions/api/alarms/alarm_manager.h

Index: chrome/browser/extensions/api/alarms/alarm_manager.h
diff --git a/chrome/browser/extensions/api/alarms/alarm_manager.h b/chrome/browser/extensions/api/alarms/alarm_manager.h
index 6912ee2bcce51f1d7fd6853e6692a37f9989d438..a0c9711c2f3f0a10c890500c5a0b4107d92bb271 100644
--- a/chrome/browser/extensions/api/alarms/alarm_manager.h
+++ b/chrome/browser/extensions/api/alarms/alarm_manager.h
@@ -203,11 +203,11 @@ class AlarmManager : public BrowserContextKeyedAPI,
 
   // ExtensionRegistryObserver implementation.
   virtual void OnExtensionLoaded(content::BrowserContext* browser_context,
-                                 const Extension* extension) OVERRIDE;
+                                 const Extension* extension) override;
   virtual void OnExtensionUninstalled(
       content::BrowserContext* browser_context,
       const Extension* extension,
-      extensions::UninstallReason reason) OVERRIDE;
+      extensions::UninstallReason reason) override;
 
   // BrowserContextKeyedAPI implementation.
   static const char* service_name() {