WP_Customize_Background_Image_Control::enqueue()

	public function enqueue() {
		parent::enqueue();

		$custom_background = get_theme_support( 'custom-background' );
		wp_localize_script( 'customize-controls', '_wpCustomizeBackground', array(
			'defaults' => ! empty( $custom_background[0] ) ? $custom_background[0] : array(),
			'nonces' => array(
				'add' => wp_create_nonce( 'background-add' ),
			),
		) );
	}