Removes WmShelfAura and WmShelfMus

ash/aura/wm_shelf_aura.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 ASH_AURA_WM_SHELF_AURA_H_
-#define ASH_AURA_WM_SHELF_AURA_H_
-
-#include "ash/ash_export.h"
-#include "ash/common/shelf/wm_shelf.h"
-#include "base/macros.h"
-
-namespace ash {
-
-class ShelfBezelEventHandler;
-
-// Aura implementation of WmShelf.
-class ASH_EXPORT WmShelfAura : public WmShelf {
- public:
-  WmShelfAura();
-  ~WmShelfAura() override;
-
-  // WmShelf:
-  void CreateShelfWidget(WmWindow* root) override;
-  void WillDeleteShelfLayoutManager() override;
-  void WillChangeVisibilityState(ShelfVisibilityState new_state) override;
-
- private:
-  class AutoHideEventHandler;
-
-  // Forwards mouse and gesture events to ShelfLayoutManager for auto-hide.
-  // TODO(mash): Facilitate simliar functionality in mash: crbug.com/631216
-  std::unique_ptr<AutoHideEventHandler> auto_hide_event_handler_;
-
-  // Forwards touch gestures on a bezel sensor to the shelf.
-  // TODO(mash): Facilitate simliar functionality in mash: crbug.com/636647
-  std::unique_ptr<ShelfBezelEventHandler> bezel_event_handler_;
-
-  DISALLOW_COPY_AND_ASSIGN(WmShelfAura);
-};
-
-}  // namespace ash
-
-#endif  // ASH_AURA_WM_SHELF_AURA_H_