[mus+ash] Removes WmWindow from ash/shelf and ash/shell

ash/shelf/shelf_layout_manager.h

 // Copyright 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 ASH_SHELF_SHELF_LAYOUT_MANAGER_H_
 #define ASH_SHELF_SHELF_LAYOUT_MANAGER_H_
 
 #include <memory>
 
 #include "ash/ash_export.h"
@@ skipping 116 matching lines @@
   // Set an animation duration override for the show / hide animation of the
   // shelf. Specifying 0 leads to use the default.
   void SetAnimationDurationOverride(int duration_override_in_ms);
 
   // Overridden from wm::WmSnapToPixelLayoutManager:
   void OnWindowResized() override;
   void SetChildBounds(aura::Window* child,
                       const gfx::Rect& requested_bounds) override;
 
   // Overridden from ShellObserver:
-  void OnShelfAutoHideBehaviorChanged(WmWindow* root_window) override;
+  void OnShelfAutoHideBehaviorChanged(aura::Window* root_window) override;
   void OnPinnedStateChanged(aura::Window* pinned_window) override;
   void OnVirtualKeyboardStateChanged(bool activated,
                                      aura::Window* root_window) override;
 
   // Overridden from aura::client::ActivationChangeObserver:
   void OnWindowActivated(ActivationReason reason,
                          aura::Window* gained_active,
                          aura::Window* lost_active) override;
 
   // Overridden from keyboard::KeyboardControllerObserver:
@@ skipping 217 matching lines @@
                  keyboard::KeyboardControllerObserver>
       keyboard_observer_;
   ScopedSessionObserver scoped_session_observer_;
 
   DISALLOW_COPY_AND_ASSIGN(ShelfLayoutManager);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELF_SHELF_LAYOUT_MANAGER_H_