--- /dev/null
+<?php
+/**
+ * Customize API: WP_Customize_Background_Image_Setting class
+ *
+ * @package WordPress
+ * @subpackage Customize
+ * @since 4.4.0
+ */
+
+/**
+ * Customizer Background Image Setting class.
+ *
+ * @since 3.4.0
+ *
+ * @see WP_Customize_Setting
+ */
+final class WP_Customize_Background_Image_Setting extends WP_Customize_Setting {
+ public $id = 'background_image_thumb';
+
+ /**
+ * @since 3.4.0
+ *
+ * @param $value
+ */
+ public function update( $value ) {
+ remove_theme_mod( 'background_image_thumb' );
+ }
+}