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

ash/common/wm/overview/window_selector_item.cc

Index: ash/common/wm/overview/window_selector_item.cc
diff --git a/ash/common/wm/overview/window_selector_item.cc b/ash/common/wm/overview/window_selector_item.cc
index 1943920c2b16776fbba32149c6b2051a89776cbd..f836c767fde0b6c7af936eb103f829e4b8d87b6b 100644
--- a/ash/common/wm/overview/window_selector_item.cc
+++ b/ash/common/wm/overview/window_selector_item.cc
@@ -414,6 +414,7 @@ void WindowSelectorItem::ButtonPressed(views::Button* sender,
       AnimateOpacity(
           0.0, OverviewAnimationType::OVERVIEW_ANIMATION_CLOSE_SELECTOR_ITEM);
     }
+    window_selector_->WindowClosing(this);
     transform_window_.Close();
     return;
   }