chromeos: Rename ash::WmShelf to Shelf

ash/shelf/overflow_button.h

 // Copyright 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_SHELF_OVERFLOW_BUTTON_H_
 #define ASH_SHELF_OVERFLOW_BUTTON_H_
 
 #include "ash/ash_export.h"
 #include "base/macros.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/image/image_skia.h"
 #include "ui/views/controls/button/custom_button.h"
 
 namespace ash {
 namespace test {
 class OverflowButtonTestApi;
 }  // namespace test
 
+class Shelf;
 class ShelfView;
-class WmShelf;
 
 // Shelf overflow chevron button.
 class ASH_EXPORT OverflowButton : public views::CustomButton {
  public:
   // |shelf_view| is the view containing this button.
-  OverflowButton(ShelfView* shelf_view, WmShelf* wm_shelf);
+  OverflowButton(ShelfView* shelf_view, Shelf* shelf);
   ~OverflowButton() override;
 
   void OnShelfAlignmentChanged();
   void OnOverflowBubbleShown();
   void OnOverflowBubbleHidden();
 
   // Updates background and schedules a paint.
   void UpdateShelfItemBackground(SkColor color);
 
  private:
@@ skipping 31 matching lines @@
   // Cached rotations of |upward_image_|.
   gfx::ImageSkia downward_image_;
   gfx::ImageSkia leftward_image_;
   gfx::ImageSkia rightward_image_;
 
   // Current chevron image which is a pointer to one of the above images
   // according to current shelf alignment and overflow shelf visibility.
   const gfx::ImageSkia* chevron_image_;
 
   ShelfView* shelf_view_;
-  WmShelf* wm_shelf_;
+  Shelf* shelf_;
 
   // Color used to paint the background.
   SkColor background_color_;
 
   DISALLOW_COPY_AND_ASSIGN(OverflowButton);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELF_OVERFLOW_BUTTON_H_