It is time.

ui/wm/public/window_types.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 UI_WM_PUBLIC_WINDOW_TYPES_H_
-#define UI_WM_PUBLIC_WINDOW_TYPES_H_
-
-namespace ui {
-namespace wm {
-
-// This isn't a property because it can't change after the window has been
-// initialized.
-enum WindowType {
-  WINDOW_TYPE_UNKNOWN = 0,
-
-  // Regular windows that should be laid out by the client.
-  WINDOW_TYPE_NORMAL,
-
-  // Miscellaneous windows that should not be laid out by the shell.
-  WINDOW_TYPE_POPUP,
-
-  // A window intended as a control. Not laid out by the shell.
-  WINDOW_TYPE_CONTROL,
-
-  // Always on top windows aligned to bottom right of screen.
-  WINDOW_TYPE_PANEL,
-
-  WINDOW_TYPE_MENU,
-
-  WINDOW_TYPE_TOOLTIP,
-};
-
-}  // namespace wm
-}  // namespace ui
-
-#endif  // UI_WM_PUBLIC_WINDOW_TYPES_H_