cros: allow aura window not considered activatable for pointer event

ash/wm/ash_focus_rules.h

Index: ash/wm/ash_focus_rules.h
diff --git a/ash/wm/ash_focus_rules.h b/ash/wm/ash_focus_rules.h
index 97546cd7e977d34c2f6766cd1c0583e77cc77072..e3664d500cdd84de3f949964b71c2fe813337095 100644
--- a/ash/wm/ash_focus_rules.h
+++ b/ash/wm/ash_focus_rules.h
@@ -18,10 +18,6 @@ class ASH_EXPORT AshFocusRules : public ::wm::BaseFocusRules {
   AshFocusRules();
   ~AshFocusRules() override;
 
-  // Tests if the given |window| can be activated, ignoring the system modal
-  // dialog state.
-  bool IsWindowConsideredActivatable(aura::Window* window) const;

[Qiang(Joe) Xu, 2017/04/11 05:45:05]

This is actually not used anywhere. I think we should remove this API.

-
  private:
   // ::wm::BaseFocusRules:
   bool IsToplevelWindow(aura::Window* window) const override;
@@ -29,6 +25,8 @@ class ASH_EXPORT AshFocusRules : public ::wm::BaseFocusRules {
   bool IsWindowConsideredVisibleForActivation(
       aura::Window* window) const override;
   bool CanActivateWindow(aura::Window* window) const override;
+  bool IsWindowConsideredActivatableForEvent(aura::Window* window,
+                                             ui::Event* event) const override;
   aura::Window* GetNextActivatableWindow(aura::Window* ignore) const override;
 
   aura::Window* GetTopmostWindowToActivateForContainerIndex(