ash: Remove ash::Shelf in favor of ash::WmShelf

ash/common/wm/dock/docked_window_layout_manager.h

 // Copyright (c) 2013 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_COMMON_WM_DOCK_DOCKED_WINDOW_LAYOUT_MANAGER_H_
 #define ASH_COMMON_WM_DOCK_DOCKED_WINDOW_LAYOUT_MANAGER_H_
 
 #include <memory>
 
 #include "ash/ash_export.h"
 #include "ash/common/shell_observer.h"
 #include "ash/common/wm/dock/dock_types.h"
 #include "ash/common/wm/dock/docked_window_layout_manager_observer.h"
 #include "ash/common/wm/window_state_observer.h"
 #include "ash/common/wm/wm_snap_to_pixel_layout_manager.h"
 #include "ash/common/wm_activation_observer.h"
 #include "ash/common/wm_root_window_controller_observer.h"
 #include "ash/common/wm_window_observer.h"
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/observer_list.h"
 #include "base/time/time.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/keyboard/keyboard_controller_observer.h"
 
 namespace ash {
 class DockedBackgroundWidget;
 class DockedWindowLayoutManagerObserver;
 class DockedWindowResizerTest;
-class Shelf;
 class WmRootWindowController;
 class WmShelf;
 
 // DockedWindowLayoutManager is responsible for organizing windows when they are
 // docked to the side of a screen. It is associated with a specific container
 // window (i.e. kShellWindowId_DockedContainer) and controls the layout of any
 // windows added to that container.
 //
 // The constructor takes a |dock_container| argument which is expected to set
 // its layout manager to this instance, e.g.:
@@ skipping 272 matching lines @@
 
   // Observers of dock bounds changes.
   base::ObserverList<DockedWindowLayoutManagerObserver> observer_list_;
 
   DISALLOW_COPY_AND_ASSIGN(DockedWindowLayoutManager);
 };
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_WM_DOCK_DOCKED_WINDOW_LAYOUT_MANAGER_H_