root/ash/desktop_background/

1. desktop_background_controller.cc
2. desktop_background_controller.h
3. desktop_background_controller_observer.h
4. desktop_background_controller_unittest.cc
5. desktop_background_view.cc
6. desktop_background_view.h
7. desktop_background_widget_controller.cc
8. desktop_background_widget_controller.h
9. user_wallpaper_delegate.h
10. wallpaper_resizer.cc
11. wallpaper_resizer.h
12. wallpaper_resizer_observer.h
13. wallpaper_resizer_unittest.cc