[ash-md] Adjusts animation of the selector after closing an overview item

ash/common/wm/overview/window_selector.h

Index: ash/common/wm/overview/window_selector.h
diff --git a/ash/common/wm/overview/window_selector.h b/ash/common/wm/overview/window_selector.h
index b5b69e04fbfc5f04b758c3063cf994a31b669e77..da17731ed2f13f3e72bb403b5326f3afaa4f3d9f 100644
--- a/ash/common/wm/overview/window_selector.h
+++ b/ash/common/wm/overview/window_selector.h
@@ -64,6 +64,9 @@ class ASH_EXPORT WindowSelector : public display::DisplayObserver,
   // Activates |window|.
   void SelectWindow(WmWindow* window);
 
+  // Called when |window| is about to get closed.
+  void WindowClosing(WindowSelectorItem* window);
+
   bool restoring_minimized_windows() const {
     return restoring_minimized_windows_;
   }