Standardize usage of virtual/override/final in content/renderer/

content/renderer/notification_permission_dispatcher.h

Index: content/renderer/notification_permission_dispatcher.h
diff --git a/content/renderer/notification_permission_dispatcher.h b/content/renderer/notification_permission_dispatcher.h
index 35f24c2826344d9853982af835b774abf15fe0f2..c01b0632784ed66f1a5a857c8ca63f3769e9caaf 100644
--- a/content/renderer/notification_permission_dispatcher.h
+++ b/content/renderer/notification_permission_dispatcher.h
@@ -21,7 +21,7 @@ namespace content {
 class NotificationPermissionDispatcher : public RenderFrameObserver {
  public:
   explicit NotificationPermissionDispatcher(RenderFrame* render_frame);
-  virtual ~NotificationPermissionDispatcher();
+  ~NotificationPermissionDispatcher() override;
 
   // Requests permission to display Web Notifications for |origin|. The callback
   // will be invoked when the permission status is available. This class will
@@ -32,7 +32,7 @@ class NotificationPermissionDispatcher : public RenderFrameObserver {
 
  private:
   // RenderFrameObserver implementation.
-  virtual bool OnMessageReceived(const IPC::Message& message) override;
+  bool OnMessageReceived(const IPC::Message& message) override;
 
   void OnPermissionRequestComplete(
       int request_id, blink::WebNotificationPermission result);