[mus+ash] Removes WmWindow from ash/wm/root_window_finder.h

ash/test/ui_controls_factory_ash.cc

Index: ash/test/ui_controls_factory_ash.cc
diff --git a/ash/test/ui_controls_factory_ash.cc b/ash/test/ui_controls_factory_ash.cc
index a5afa55241d22bb6b612fe24da5e818a88cd12c8..8e4719bfa4857f4c3addde2ed2785dd918af241f 100644
--- a/ash/test/ui_controls_factory_ash.cc
+++ b/ash/test/ui_controls_factory_ash.cc
@@ -5,7 +5,6 @@
 #include "ash/shell.h"
 #include "ash/wm/root_window_finder.h"
 #include "ash/wm/window_properties.h"
-#include "ash/wm_window.h"
 #include "ui/aura/client/capture_client.h"
 #include "ui/aura/client/screen_position_client.h"
 #include "ui/aura/env.h"
@@ -44,8 +43,7 @@ UIControlsAura* GetUIControlsForRootWindow(aura::Window* root_window) {
 // Returns the UIControls object for the RootWindow at |point_in_screen|.
 UIControlsAura* GetUIControlsAt(const gfx::Point& point_in_screen) {
   // TODO(mazda): Support the case passive grab is taken.
-  return GetUIControlsForRootWindow(
-      WmWindow::GetAuraWindow(ash::wm::GetRootWindowAt(point_in_screen)));
+  return GetUIControlsForRootWindow(ash::wm::GetRootWindowAt(point_in_screen));
 }
 
 }  // namespace