[ash-md] Makes Ctrl+W accelerator close a selected window in overview mode

ash/common/wm/overview/window_selector_item.h

Index: ash/common/wm/overview/window_selector_item.h
diff --git a/ash/common/wm/overview/window_selector_item.h b/ash/common/wm/overview/window_selector_item.h
index 38d7f8afc8ca04868dfc2482884d298e4dbbd876..ec503d28ed937405d3331c2876907469c3c6aa8a 100644
--- a/ash/common/wm/overview/window_selector_item.h
+++ b/ash/common/wm/overview/window_selector_item.h
@@ -101,6 +101,9 @@ class ASH_EXPORT WindowSelectorItem : public views::ButtonListener,
   // enabled.
   void SendAccessibleSelectionEvent();
 
+  // Closes |transform_window_|.
+  void CloseWindow();
+
   // Sets if the item is dimmed in the overview. Changing the value will also
   // change the visibility of the transform windows.
   void SetDimmed(bool dimmed);