mash: Partially migrate ash/desktop_background to ash common types.

ash/test/ui_controls_factory_ash.cc

 // Copyright 2013 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.
 
 #include "ash/aura/wm_window_aura.h"
 #include "ash/common/wm/root_window_finder.h"
 #include "ash/shell.h"
-#include "ash/shell_factory.h"
 #include "ash/wm/window_properties.h"
 #include "ui/aura/client/capture_client.h"
 #include "ui/aura/client/screen_position_client.h"
 #include "ui/aura/env.h"
 #include "ui/aura/test/ui_controls_factory_aura.h"
 #include "ui/aura/window_property.h"
 #include "ui/aura/window_tree_host.h"
 #include "ui/base/test/ui_controls.h"
 #include "ui/base/test/ui_controls_aura.h"
 #include "ui/display/screen.h"
@@ skipping 110 matching lines @@
  private:
   DISALLOW_COPY_AND_ASSIGN(UIControlsAsh);
 };
 
 ui_controls::UIControlsAura* CreateAshUIControls() {
   return new ash::test::UIControlsAsh();
 }
 
 }  // namespace test
 }  // namespace ash