OnWallpaperDataChanged  273 ash/desktop_background/desktop_background_controller.cc                     OnWallpaperDataChanged());
OnWallpaperDataChanged  362 ash/desktop_background/desktop_background_controller.cc                     OnWallpaperDataChanged());
OnWallpaperDataChanged   15 ash/desktop_background/desktop_background_controller_observer.h   virtual void OnWallpaperDataChanged() = 0;