Moves couple of WmShell methods to standalone functions

ash/wm/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 ASH_WM_WINDOW_UTIL_H_
 #define ASH_WM_WINDOW_UTIL_H_
 
 #include <stdint.h>
 
 #include "ash/ash_export.h"
@@ skipping 11 matching lines @@
 namespace ash {
 
 namespace wm {
 
 // Utility functions for window activation.
 ASH_EXPORT void ActivateWindow(aura::Window* window);
 ASH_EXPORT void DeactivateWindow(aura::Window* window);
 ASH_EXPORT bool IsActiveWindow(aura::Window* window);
 ASH_EXPORT aura::Window* GetActiveWindow();
 ASH_EXPORT bool CanActivateWindow(aura::Window* window);
+ASH_EXPORT aura::Window* GetFocusedWindow();
 
 // 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.
 ASH_EXPORT aura::Window* GetActivatableWindow(aura::Window* window);
 
+ASH_EXPORT aura::Window* GetCaptureWindow();

[James Cook, 2017/03/31 19:29:52]

nit: Can you write a comment for this?

[sky, 2017/03/31 20:15:14]

I kind of figured it was obvious (similar to lack of comments for similar
getters above), but I'll add one.

+
 // Returns true if |window|'s location can be controlled by the user.
 ASH_EXPORT bool IsWindowUserPositionable(aura::Window* window);
 
 // Pins the window on top of other windows.
 ASH_EXPORT void PinWindow(aura::Window* window, bool trusted);
 
 // Indicates that the window should autohide the shelf when it is the active
 // window.
 ASH_EXPORT void SetAutoHideShelf(aura::Window* window, bool autohide);
 
@@ skipping 11 matching lines @@
 
 // Mark the container window so that InstallSnapLayoutManagerToContainers
 // installs the SnapToPixelLayoutManager.
 ASH_EXPORT void SetSnapsChildrenToPhysicalPixelBoundary(
     aura::Window* container);
 
 }  // namespace wm
 }  // namespace ash
 
 #endif  // ASH_WM_WINDOW_UTIL_H_