The "Update Chrome" menu item should appear in addition to the About menu.

app/menus/menu_model.h

Index: app/menus/menu_model.h
diff --git a/app/menus/menu_model.h b/app/menus/menu_model.h
index c91efc905fc2bf949ea2c25df4ee69c063e295cd..1cb356a6a7a2168ed8dc25f2caf5f2e48ada8d35 100644
--- a/app/menus/menu_model.h
+++ b/app/menus/menu_model.h
@@ -94,6 +94,9 @@ class MenuModel {
   // Returns the enabled state of the item at the specified index.
   virtual bool IsEnabledAt(int index) const = 0;
 
+  // Returns true if the menu item is visible.
+  virtual bool IsVisibleAt(int index) const;
+
   // Returns the model for the submenu at the specified index.
   virtual MenuModel* GetSubmenuModelAt(int index) const = 0;