It is time.

ui/wm/core/window_util.h

-// Copyright (c) 2012 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_WINDOW_UTIL_H_
-#define UI_WM_CORE_WINDOW_UTIL_H_
-
-#include <vector>
-
-#include "base/basictypes.h"
-#include "base/compiler_specific.h"
-#include "base/memory/scoped_ptr.h"
-#include "ui/wm/wm_export.h"
-
-namespace aura {
-class Window;
-}
-
-namespace ui {
-class Layer;
-class LayerOwner;
-class LayerTreeOwner;
-}
-
-namespace wm {
-
-WM_EXPORT void ActivateWindow(aura::Window* window);
-WM_EXPORT void DeactivateWindow(aura::Window* window);
-WM_EXPORT bool IsActiveWindow(aura::Window* window);
-WM_EXPORT bool CanActivateWindow(aura::Window* window);
-
-// Retrieves the activatable window for |window|. The ActivationClient makes
-// this determination.
-WM_EXPORT aura::Window* GetActivatableWindow(aura::Window* window);
-
-// Retrieves the toplevel window for |window|. The ActivationClient makes this
-// determination.
-WM_EXPORT aura::Window* GetToplevelWindow(aura::Window* window);
-
-// Returns the existing Layer for |root| (and all its descendants) and creates
-// a new layer for |root| and all its descendants. This is intended for
-// animations that want to animate between the existing visuals and a new state.
-//
-// As a result of this |root| has freshly created layers, meaning the layers
-// have not yet been painted to.
-WM_EXPORT scoped_ptr<ui::LayerTreeOwner> RecreateLayers(
-    ui::LayerOwner* root);
-
-// Convenience functions that get the TransientWindowManager for the window and
-// redirect appropriately. These are preferable to calling functions on
-// TransientWindowManager as they handle the appropriate NULL checks.
-WM_EXPORT aura::Window* GetTransientParent(aura::Window* window);
-WM_EXPORT const aura::Window* GetTransientParent(
-    const aura::Window* window);
-WM_EXPORT const std::vector<aura::Window*>& GetTransientChildren(
-    const aura::Window* window);
-WM_EXPORT void AddTransientChild(aura::Window* parent, aura::Window* child);
-WM_EXPORT void RemoveTransientChild(aura::Window* parent, aura::Window* child);
-
-// Returns true if |window| has |ancestor| as a transient ancestor. A transient
-// ancestor is found by following the transient parent chain of the window.
-WM_EXPORT bool HasTransientAncestor(const aura::Window* window,
-                                    const aura::Window* ancestor);
-
-}  // namespace wm
-
-#endif  // UI_WM_CORE_WINDOW_UTIL_H_