cros: allow aura window not considered activatable for pointer event

ui/wm/core/base_focus_rules.h

Index: ui/wm/core/base_focus_rules.h
diff --git a/ui/wm/core/base_focus_rules.h b/ui/wm/core/base_focus_rules.h
index 0e84e29c48b8fd8a9c0bcd1cc0a5d67f50661b9e..0d15422e3e3554390ae4cb06de1cb1dc1248bf5e 100644
--- a/ui/wm/core/base_focus_rules.h
+++ b/ui/wm/core/base_focus_rules.h
@@ -29,6 +29,8 @@ class WM_EXPORT BaseFocusRules : public FocusRules {
   bool IsToplevelWindow(aura::Window* window) const override;
   bool CanActivateWindow(aura::Window* window) const override;
   bool CanFocusWindow(aura::Window* window) const override;
+  bool IsWindowConsideredActivatableForEvent(aura::Window* window,
+                                             ui::Event* event) const override;
   aura::Window* GetToplevelWindow(aura::Window* window) const override;
   aura::Window* GetActivatableWindow(aura::Window* window) const override;
   aura::Window* GetFocusableWindow(aura::Window* window) const override;