add HideAndClose in preference to having Close sometimes magically defer

ui/views/widget/desktop_aura/desktop_root_window_host_win.h

Index: ui/views/widget/desktop_aura/desktop_root_window_host_win.h
diff --git a/ui/views/widget/desktop_aura/desktop_root_window_host_win.h b/ui/views/widget/desktop_aura/desktop_root_window_host_win.h
index 9aa17c05dc6e39b6b7f355278997062c55581503..cb9188aa1fbc114ca48bda150844ff7e1299922e 100644
--- a/ui/views/widget/desktop_aura/desktop_root_window_host_win.h
+++ b/ui/views/widget/desktop_aura/desktop_root_window_host_win.h
@@ -50,6 +50,7 @@ class VIEWS_EXPORT DesktopRootWindowHostWin
   virtual aura::RootWindow* Init(aura::Window* content_window,
                                  const Widget::InitParams& params) OVERRIDE;
   virtual void InitFocus(aura::Window* window) OVERRIDE;
+  virtual bool SetCloseOnHideCompletion() OVERRIDE;
   virtual void Close() OVERRIDE;
   virtual void CloseNow() OVERRIDE;
   virtual aura::RootWindowHost* AsRootWindowHost() OVERRIDE;
@@ -247,11 +248,6 @@ class VIEWS_EXPORT DesktopRootWindowHostWin
   // clipped.
   gfx::Rect window_expansion_;
 
-  // Whether the window close should be converted to a hide, and then actually
-  // closed on the completion of the hide animation. This is cached because
-  // the property is set on the contained window which has a shorter lifetime.
-  bool should_animate_window_close_;
-
   // When Close()d and animations are being applied to this window, the close
   // of the window needs to be deferred to when the close animation is
   // completed. This variable indicates that a Close was converted to a Hide,