[views] Makes DesktopWindowTreeHostX11::FrameTypeChanged use PostTask

ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h

Index: ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h
diff --git a/ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h b/ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h
index 7b78e7ea01c9976a3cae0168cc8a2e6ab0d6b2cd..34a7e75f7af704127b5ebb44f1b1955cd7491342 100644
--- a/ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h
+++ b/ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h
@@ -271,6 +271,7 @@ class VIEWS_EXPORT DesktopWindowTreeHostX11
   uint32_t DispatchEvent(const ui::PlatformEvent& event) override;
 
   void DelayedResize(const gfx::Size& size_in_pixels);
+  void DelayedChangeFrameType(Widget::FrameType new_type);
 
   gfx::Rect GetWorkAreaBoundsInPixels() const;
   gfx::Rect ToDIPRect(const gfx::Rect& rect_in_pixels) const;