[mus+ash] Removes WmWindow from RootWindowcontroller implementation

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 59 matching lines @@
 // Mark the container window so that InstallSnapLayoutManagerToContainers
 // installs the SnapToPixelLayoutManager.
 ASH_EXPORT void SetSnapsChildrenToPhysicalPixelBoundary(
     aura::Window* container);
 
 // Convenience for window->delegate()->GetNonClientComponent(location) that
 // returns HTNOWHERE if window->delegate() is null.
 ASH_EXPORT int GetNonClientComponent(aura::Window* window,
                                      const gfx::Point& location);
 
+// When set, the child windows should get a slightly larger hit region to make
+// resizing easier.
+ASH_EXPORT void SetChildrenUseExtendedHitRegionForWindow(aura::Window* window);
+ASH_EXPORT bool ShouldUseExtendedHitRegionForWindow(const aura::Window* window);
+
 // Requests the |window| to close and destroy itself. This is intended to
 // forward to an associated widget.
 ASH_EXPORT void CloseWidgetForWindow(aura::Window* window);
 
 // Adds or removes a handler to receive events targeted at this window, before
 // this window handles the events itself; the handler does not receive events
 // from embedded windows. This only supports windows with internal widgets;
 // see ash::GetInternalWidgetForWindow(). Ownership of the handler is not
 // transferred.
 //
 // Also note that the target of these events is always an aura::Window.
 ASH_EXPORT void AddLimitedPreTargetHandlerForWindow(ui::EventHandler* handler,
                                                     aura::Window* window);
 ASH_EXPORT void RemoveLimitedPreTargetHandlerForWindow(
     ui::EventHandler* handler,
     aura::Window* window);
 
 }  // namespace wm
 }  // namespace ash
 
 #endif  // ASH_WM_WINDOW_UTIL_H_