Standardize usage of virtual/override/final specifiers.

chrome/browser/ui/ash/launcher/chrome_launcher_app_menu_item_tab.h

Index: chrome/browser/ui/ash/launcher/chrome_launcher_app_menu_item_tab.h
diff --git a/chrome/browser/ui/ash/launcher/chrome_launcher_app_menu_item_tab.h b/chrome/browser/ui/ash/launcher/chrome_launcher_app_menu_item_tab.h
index 81d83b4121212a9150463c65954fe6e61326df48..7b10c6e1d2e122383e60fb73e2c6d7f9388e7c62 100644
--- a/chrome/browser/ui/ash/launcher/chrome_launcher_app_menu_item_tab.h
+++ b/chrome/browser/ui/ash/launcher/chrome_launcher_app_menu_item_tab.h
@@ -26,9 +26,9 @@ class ChromeLauncherAppMenuItemTab
                                const gfx::Image* icon,
                                content::WebContents* content,
                                bool has_leading_separator);
-  virtual bool IsActive() const override;
-  virtual bool IsEnabled() const override;
-  virtual void Execute(int event_flags) override;
+  bool IsActive() const override;
+  bool IsEnabled() const override;
+  void Execute(int event_flags) override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ChromeLauncherAppMenuItemTab);