diff -r 490d5cc509ed -r cf61fcea0001 wp/wp-admin/includes/class-bulk-theme-upgrader-skin.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-admin/includes/class-bulk-theme-upgrader-skin.php	Mon Oct 14 17:39:30 2019 +0200
@@ -0,0 +1,67 @@
+<?php
+/**
+ * Upgrader API: Bulk_Plugin_Upgrader_Skin class
+ *
+ * @package WordPress
+ * @subpackage Upgrader
+ * @since 4.6.0
+ */
+
+/**
+ * Bulk Theme Upgrader Skin for WordPress Theme Upgrades.
+ *
+ * @since 3.0.0
+ * @since 4.6.0 Moved to its own file from wp-admin/includes/class-wp-upgrader-skins.php.
+ *
+ * @see Bulk_Upgrader_Skin
+ */
+class Bulk_Theme_Upgrader_Skin extends Bulk_Upgrader_Skin {
+	public $theme_info = array(); // Theme_Upgrader::bulk() will fill this in.
+
+	public function add_strings() {
+		parent::add_strings();
+		$this->upgrader->strings['skin_before_update_header'] = __('Updating Theme %1$s (%2$d/%3$d)');
+	}
+
+	/**
+	 *
+	 * @param string $title
+	 */
+	public function before($title = '') {
+		parent::before( $this->theme_info->display('Name') );
+	}
+
+	/**
+	 *
+	 * @param string $title
+	 */
+	public function after($title = '') {
+		parent::after( $this->theme_info->display('Name') );
+		$this->decrement_update_count( 'theme' );
+	}
+
+	/**
+	 */
+	public function bulk_footer() {
+		parent::bulk_footer();
+		$update_actions =  array(
+			'themes_page' => '<a href="' . self_admin_url( 'themes.php' ) . '" target="_parent">' . __( 'Return to Themes page' ) . '</a>',
+			'updates_page' => '<a href="' . self_admin_url( 'update-core.php' ) . '" target="_parent">' . __( 'Return to WordPress Updates page' ) . '</a>'
+		);
+		if ( ! current_user_can( 'switch_themes' ) && ! current_user_can( 'edit_theme_options' ) )
+			unset( $update_actions['themes_page'] );
+
+		/**
+		 * Filters the list of action links available following bulk theme updates.
+		 *
+		 * @since 3.0.0
+		 *
+		 * @param array $update_actions Array of theme action links.
+		 * @param array $theme_info     Array of information for the last-updated theme.
+		 */
+		$update_actions = apply_filters( 'update_bulk_theme_complete_actions', $update_actions, $this->theme_info );
+
+		if ( ! empty($update_actions) )
+			$this->feedback(implode(' | ', (array)$update_actions));
+	}
+}