int GetTooltipShownTimeout();
+ // Sets tooltip window to |target| if it is different from existing window.
+ // Calls RemoveObserver on the existing window if it is not NULL.
+ // Calls AddObserver on the new window if it is not NULL.
+ void SetTooltipWindow(aura::Window* target);
+
aura::Window* tooltip_window_;
base::string16 tooltip_text_;