Converts some services to use aura-mus

ui/views/mus/desktop_window_tree_host_mus.h

 // Copyright 2016 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_MUS_H_
 #define UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_WINDOW_TREE_HOST_MUS_H_
 
 #include <memory>
 #include <set>
 
@@ skipping 34 matching lines @@
 
   // Helper function to get the scale factor.
   float GetScaleFactor() const;
 
   void SetBoundsInDIP(const gfx::Rect& bounds_in_dip);
 
   // DesktopWindowTreeHost:
   void Init(aura::Window* content_window,
             const Widget::InitParams& params) override;
   void OnNativeWidgetCreated(const Widget::InitParams& params) override;
+  void OnWidgetInitDone() override;
   std::unique_ptr<corewm::Tooltip> CreateTooltip() override;
   std::unique_ptr<aura::client::DragDropClient> CreateDragDropClient(
       DesktopNativeCursorManager* cursor_manager) override;
   void Close() override;
   void CloseNow() override;
   aura::WindowTreeHost* AsWindowTreeHost() override;
   void ShowWindowWithState(ui::WindowShowState state) override;
   void ShowMaximizedWithBounds(const gfx::Rect& restored_bounds) override;
   bool IsVisible() const override;
   void SetSize(const gfx::Size& size) override;
@@ skipping 78 matching lines @@
 
   // Used so that Close() isn't immediate.
   base::WeakPtrFactory<DesktopWindowTreeHostMus> close_widget_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DesktopWindowTreeHostMus);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_WINDOW_TREE_HOST_MUS_H_