Promotes WmWindowMus functions to WmWindowAura and nukes WmWindowMus

ash/mus/bridge/wm_window_mus.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_MUS_BRIDGE_WM_WINDOW_MUS_H_
-#define ASH_MUS_BRIDGE_WM_WINDOW_MUS_H_
-
-#include <memory>
-
-#include "ash/aura/wm_window_aura.h"
-#include "base/macros.h"
-
-namespace aura {
-class Window;
-}
-
-namespace views {
-class Widget;
-}
-
-namespace ash {
-namespace mus {
-
-// WmWindow implementation for mus.
-//
-// WmWindowMus is tied to the life of the underlying aura::Window (it is stored
-// as an owned property).
-class WmWindowMus : public WmWindowAura {
- public:
-  explicit WmWindowMus(aura::Window* window);
-  // NOTE: this class is owned by the corresponding window. You shouldn't delete
-  // TODO(sky): friend deleter and make private.
-  ~WmWindowMus() override;
-
-  // Returns a WmWindow for an aura::Window, creating if necessary.
-  static WmWindowMus* Get(aura::Window* window) {
-    return const_cast<WmWindowMus*>(
-        Get(const_cast<const aura::Window*>(window)));
-  }
-  static const WmWindowMus* Get(const aura::Window* window);
-
-  static WmWindowMus* Get(views::Widget* widget);
-
-  static WmWindowMus* AsWmWindowMus(WmWindow* window) {
-    return static_cast<WmWindowMus*>(window);
-  }
-  static const WmWindowMus* AsWmWindowMus(const WmWindow* window) {
-    return static_cast<const WmWindowMus*>(window);
-  }
-
-  // Returns true if this window is considered a shell window container.
-  bool IsContainer() const;
-
-  // WmWindow:
-  WmShell* GetShell() const override;
-  void CloseWidget() override;
-  void AddLimitedPreTargetHandler(ui::EventHandler* handler) override;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(WmWindowMus);
-};
-
-}  // namespace mus
-}  // namespace ash
-
-#endif  // ASH_MUS_BRIDGE_WM_WINDOW_MUS_H_