Removes WmRootWindowController subclasses

ash/aura/wm_root_window_controller_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_ROOT_CONTROLLER_AURA_H_
-#define ASH_AURA_WM_ROOT_CONTROLLER_AURA_H_
-
-#include "ash/ash_export.h"
-#include "ash/common/wm_root_window_controller.h"
-#include "base/macros.h"
-
-namespace aura {
-class Window;
-}
-
-namespace ash {
-
-class RootWindowController;
-
-class ASH_EXPORT WmRootWindowControllerAura : public WmRootWindowController {
- public:
-  explicit WmRootWindowControllerAura(
-      RootWindowController* root_window_controller);
-  ~WmRootWindowControllerAura() override;
-
-  static WmRootWindowControllerAura* Get(aura::Window* window) {
-    return const_cast<WmRootWindowControllerAura*>(
-        Get(const_cast<const aura::Window*>(window)));
-  }
-  static const WmRootWindowControllerAura* Get(const aura::Window* window);
-
-  // WmRootWindowController:
-  bool HasShelf() override;
-  WmShelf* GetShelf() override;
-  WmWindow* GetWindow() override;
-  void OnInitialWallpaperAnimationStarted() override;
-  void OnWallpaperAnimationFinished(views::Widget* widget) override;
-
- protected:
-  // WmRootWindowController:
-  bool ShouldDestroyWindowInCloseChildWindows(WmWindow* window) override;
-
- private:
-  friend class RootWindowController;
-
-  RootWindowController* root_window_controller_;
-
-  DISALLOW_COPY_AND_ASSIGN(WmRootWindowControllerAura);
-};
-
-}  // namespace ash
-
-#endif  // ASH_AURA_WM_ROOT_CONTROLLER_AURA_H_