Hide add new profile menu entry for managed users.

chrome/browser/profiles/avatar_menu_model.h

Index: chrome/browser/profiles/avatar_menu_model.h
diff --git a/chrome/browser/profiles/avatar_menu_model.h b/chrome/browser/profiles/avatar_menu_model.h
index 965913ddd2ec5399c611251e76f66d7a8815e1c4..308a8250299490cca826277f73ab7222b5b77bbd 100644
--- a/chrome/browser/profiles/avatar_menu_model.h
+++ b/chrome/browser/profiles/avatar_menu_model.h
@@ -78,6 +78,9 @@ class AvatarMenuModel : public content::NotificationObserver {
   // Gets the an Item at a specified index.
   const Item& GetItemAt(size_t index);
 
+  // Returns true if the add profile link should be shown.
+  bool ShouldShowAddNewProfileLink() const;
+
   // This model is also used for the always-present Mac system menubar. As the
   // last active browser changes, the model needs to update accordingly.
   void set_browser(Browser* browser) { browser_ = browser; }