Eliminates all ash dependencies from WindowModalityController.

ui/views/corewm/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_VIEWS_COREWM_WINDOW_UTIL_H_
 #define UI_VIEWS_COREWM_WINDOW_UTIL_H_
 
 #include "base/compiler_specific.h"
 #include "ui/views/views_export.h"
 
 namespace aura {
 class Window;
 }
 
 namespace ui {
 class Layer;
 }
 
 namespace views {
 namespace corewm {
 
+VIEWS_EXPORT void ActivateWindow(aura::Window* window);
+VIEWS_EXPORT void DeactivateWindow(aura::Window* window);
+VIEWS_EXPORT bool IsActiveWindow(aura::Window* window);
+VIEWS_EXPORT bool CanActivateWindow(aura::Window* window);
+
+// Retrieves the activatable window for |window|. The ActivationClient makes
+// this determination.
+VIEWS_EXPORT aura::Window* GetActivatableWindow(aura::Window* window);
+
 // Deletes |layer| and all its child layers.
 VIEWS_EXPORT void DeepDeleteLayers(ui::Layer* layer);
 
 // Returns the existing Layer for |window| (and all its descendants) and creates
 // a new layer for |window| and all its descendants. This is intended for
 // animations that want to animate between the existing visuals and a new window
 // state. The caller owns the return value.
 //
 // As a result of this |window| has freshly created layers, meaning the layers
 // are all empty (nothing has been painted to them) and are sized to 0x0. Soon
 // after this call you need to reset the bounds of the window. Or, you can pass
 // true as the second argument to let the function do that.
 VIEWS_EXPORT ui::Layer* RecreateWindowLayers(aura::Window* window,
                                             bool set_bounds) WARN_UNUSED_RESULT;
 
 }  // namespace corewm
 }  // namespace views
 
 #endif  // UI_VIEWS_COREWM_WINDOW_UTIL_H_