[views] Makes DesktopWindowTreeHostX11::FrameTypeChanged use PostTask

ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_WINDOW_TREE_HOST_X11_H_
 #define UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_WINDOW_TREE_HOST_X11_H_
 
 #include <stddef.h>
 #include <stdint.h>
 #include <X11/extensions/shape.h>
@@ skipping 253 matching lines @@
   void SetWindowTransparency();
 
   // Relayout the widget's client and non-client views.
   void Relayout();
 
   // ui::PlatformEventDispatcher:
   bool CanDispatchEvent(const ui::PlatformEvent& event) override;
   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;
   gfx::Rect ToPixelRect(const gfx::Rect& rect_in_dip) const;
 
   // Enables event listening after closing |dialog|.
   void EnableEventListening();
 
   // X11 things
   // The display and the native X window hosting the root window.
@@ skipping 147 matching lines @@
 
   base::WeakPtrFactory<DesktopWindowTreeHostX11> close_widget_factory_;
   base::WeakPtrFactory<DesktopWindowTreeHostX11> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DesktopWindowTreeHostX11);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_WINDOW_TREE_HOST_X11_H_