Filter all events in SystemModalContainerEventHandler

ash/wm/system_modal_container_event_filter.h

Index: ash/wm/system_modal_container_event_filter.h
diff --git a/ash/wm/system_modal_container_event_filter.h b/ash/wm/system_modal_container_event_filter.h
index e98e7e00d6a37b4865c213ac58734148ea130921..8f8b58a3e6b8733de0dd99ef261bd37bbcb106c9 100644
--- a/ash/wm/system_modal_container_event_filter.h
+++ b/ash/wm/system_modal_container_event_filter.h
@@ -20,9 +20,8 @@ class ASH_EXPORT SystemModalContainerEventFilter : public ui::EventHandler {
       SystemModalContainerEventFilterDelegate* delegate);
   ~SystemModalContainerEventFilter() override;
 
-  // Overridden from ui::EventHandler:
-  void OnKeyEvent(ui::KeyEvent* event) override;
-  void OnMouseEvent(ui::MouseEvent* event) override;
+  // ui::EventHandler:
+  void OnEvent(ui::Event* event) override;
 
  private:
   SystemModalContainerEventFilterDelegate* delegate_;