Converts ShellObserver from aura::Window to ash::WmWindow

ash/wm/panels/attached_panel_window_targeter.h

 // Copyright 2014 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 ASH_WM_PANELS_ATTACHED_PANEL_WINDOW_TARGETER_H_
 #define ASH_WM_PANELS_ATTACHED_PANEL_WINDOW_TARGETER_H_
 
 #include "ash/shell_observer.h"
 #include "base/macros.h"
 #include "ui/wm/core/easy_resize_window_targeter.h"
 
 namespace ash {
 
 class PanelLayoutManager;
 
 // A window targeter installed on a panel container to disallow touch
 // hit-testing of attached panel edges that are adjacent to the shelf. This
 // makes it significantly easier to correctly target shelf buttons with touch.
 class AttachedPanelWindowTargeter : public ::wm::EasyResizeWindowTargeter,
                                     public ShellObserver {
  public:
   AttachedPanelWindowTargeter(aura::Window* container,
                               const gfx::Insets& default_mouse_extend,
                               const gfx::Insets& default_touch_extend,
                               PanelLayoutManager* panel_layout_manager);
   ~AttachedPanelWindowTargeter() override;
 
   // ShellObserver:
-  void OnShelfCreatedForRootWindow(aura::Window* root_window) override;
-  void OnShelfAlignmentChanged(aura::Window* root_window) override;
+  void OnShelfCreatedForRootWindow(WmWindow* root_window) override;
+  void OnShelfAlignmentChanged(WmWindow* root_window) override;
 
  private:
   void UpdateTouchExtend(aura::Window* root_window);
 
   aura::Window* panel_container_;
   PanelLayoutManager* panel_layout_manager_;
   gfx::Insets default_touch_extend_;
 
   DISALLOW_COPY_AND_ASSIGN(AttachedPanelWindowTargeter);
 };
 
 }  // namespace ash
 
 #endif  // ASH_WM_PANELS_ATTACHED_PANEL_WINDOW_TARGETER_H_