Move some more WM functionality down into ash.

ui/aura_shell/window_util.h

-// Copyright (c) 2011 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_AURA_SHELL_WINDOW_UTIL_H_
-#define UI_AURA_SHELL_WINDOW_UTIL_H_
-#pragma once
-
-#include "ui/aura_shell/aura_shell_export.h"
-
-namespace aura {
-class Window;
-}
-
-namespace aura_shell {
-
-// TODO(jamescook): Put all these functions in namespace window_util.
-
-// Returns true if |window| is in the maximized state.
-AURA_SHELL_EXPORT bool IsWindowMaximized(aura::Window* window);
-
-// Convenience setters/getters for |aura::client::kRootWindowActiveWindow|.
-AURA_SHELL_EXPORT void ActivateWindow(aura::Window* window);
-AURA_SHELL_EXPORT void DeactivateWindow(aura::Window* window);
-AURA_SHELL_EXPORT bool IsActiveWindow(aura::Window* window);
-AURA_SHELL_EXPORT aura::Window* GetActiveWindow();
-
-// Retrieves the activatable window for |window|. If |window| is activatable,
-// this will just return it, otherwise it will climb the parent/transient parent
-// chain looking for a window that is activatable, per the ActivationController.
-// If you're looking for a function to get the activatable "top level" window,
-// this is probably what you're looking for.
-AURA_SHELL_EXPORT aura::Window* GetActivatableWindow(aura::Window* window);
-
-// Update window bounds based on a change in show state.
-AURA_SHELL_EXPORT void UpdateBoundsFromShowState(aura::Window* window);
-
-}  // namespace aura_shell
-
-#endif  // UI_AURA_SHELL_WINDOW_UTIL_H_