Work in progress: Adds MessagePumpDispatcher::ShouldExit(). This is used to handle the

ui/views/controls/menu/menu_controller.h

Index: ui/views/controls/menu/menu_controller.h
diff --git a/ui/views/controls/menu/menu_controller.h b/ui/views/controls/menu/menu_controller.h
index 4376b7581a5dadd6eb09dfd07dea1ba7f155279e..9a3b277d0cf6ec10df1376eff3e406fdadc36138 100644
--- a/ui/views/controls/menu/menu_controller.h
+++ b/ui/views/controls/menu/menu_controller.h
@@ -238,11 +238,10 @@ class VIEWS_EXPORT MenuController : public MessageLoop::Dispatcher {
                                  const LocatedEvent& event);
   void StartDrag(SubmenuView* source, const gfx::Point& location);
 
-#if defined(OS_WIN) || defined(USE_AURA)
   // Dispatcher method. This returns true if the menu was canceled, or
   // if the message is such that the menu should be closed.
   virtual bool Dispatch(const base::NativeEvent& event) OVERRIDE;
-#endif
+  virtual bool ShouldExit() OVERRIDE;
 
   // Key processing. The return value of this is returned from Dispatch.
   // In other words, if this returns false (which happens if escape was