It is time.

ui/wm/core/wm_state.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 UI_WM_CORE_WM_STATE_H_
-#define UI_WM_CORE_WM_STATE_H_
-
-#include "base/memory/scoped_ptr.h"
-#include "ui/wm/wm_export.h"
-
-namespace wm {
-
-class TransientWindowController;
-class TransientWindowStackingClient;
-
-// Installs state needed by the window manager.
-class WM_EXPORT WMState {
- public:
-  WMState();
-  ~WMState();
-
-  // WindowStackingClient:
- private:
-  scoped_ptr<TransientWindowStackingClient> window_stacking_client_;
-  scoped_ptr<TransientWindowController> transient_window_client_;
-
-  DISALLOW_COPY_AND_ASSIGN(WMState);
-};
-
-}  // namespace wm
-
-#endif  // UI_WM_CORE_WM_STATE_H_