diff -r 490d5cc509ed -r cf61fcea0001 wp/wp-admin/includes/class-wp-internal-pointers.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-admin/includes/class-wp-internal-pointers.php	Mon Oct 14 17:39:30 2019 +0200
@@ -0,0 +1,203 @@
+<?php
+/**
+ * Administration API: WP_Internal_Pointers class
+ *
+ * @package WordPress
+ * @subpackage Administration
+ * @since 4.4.0
+ */
+
+/**
+ * Core class used to implement an internal admin pointers API.
+ *
+ * @since 3.3.0
+ */
+final class WP_Internal_Pointers {
+	/**
+	 * Initializes the new feature pointers.
+	 *
+	 * @since 3.3.0
+	 *
+	 * All pointers can be disabled using the following:
+	 *     remove_action( 'admin_enqueue_scripts', array( 'WP_Internal_Pointers', 'enqueue_scripts' ) );
+	 *
+	 * Individual pointers (e.g. wp390_widgets) can be disabled using the following:
+	 *     remove_action( 'admin_print_footer_scripts', array( 'WP_Internal_Pointers', 'pointer_wp390_widgets' ) );
+	 *
+	 * @static
+	 *
+	 * @param string $hook_suffix The current admin page.
+	 */
+	public static function enqueue_scripts( $hook_suffix ) {
+		/*
+		 * Register feature pointers
+		 *
+		 * Format:
+		 *     array(
+		 *         hook_suffix => pointer callback
+		 *     )
+		 *
+		 * Example:
+		 *     array(
+		 *         'themes.php' => 'wp390_widgets'
+		 *     )
+		 */
+		$registered_pointers = array(
+			'index.php' => 'wp496_privacy',
+		);
+
+		// Check if screen related pointer is registered
+		if ( empty( $registered_pointers[ $hook_suffix ] ) )
+			return;
+
+		$pointers = (array) $registered_pointers[ $hook_suffix ];
+
+		/*
+		 * Specify required capabilities for feature pointers
+		 *
+		 * Format:
+		 *     array(
+		 *         pointer callback => Array of required capabilities
+		 *     )
+		 *
+		 * Example:
+		 *     array(
+		 *         'wp390_widgets' => array( 'edit_theme_options' )
+		 *     )
+		 */
+		$caps_required = array(
+			'wp496_privacy' => array(
+				'manage_privacy_options',
+				'export_others_personal_data',
+				'erase_others_personal_data',
+			),
+		);
+
+		// Get dismissed pointers
+		$dismissed = explode( ',', (string) get_user_meta( get_current_user_id(), 'dismissed_wp_pointers', true ) );
+
+		$got_pointers = false;
+		foreach ( array_diff( $pointers, $dismissed ) as $pointer ) {
+			if ( isset( $caps_required[ $pointer ] ) ) {
+				foreach ( $caps_required[ $pointer ] as $cap ) {
+					if ( ! current_user_can( $cap ) )
+						continue 2;
+				}
+			}
+
+			// Bind pointer print function
+			add_action( 'admin_print_footer_scripts', array( 'WP_Internal_Pointers', 'pointer_' . $pointer ) );
+			$got_pointers = true;
+		}
+
+		if ( ! $got_pointers )
+			return;
+
+		// Add pointers script and style to queue
+		wp_enqueue_style( 'wp-pointer' );
+		wp_enqueue_script( 'wp-pointer' );
+	}
+
+	/**
+	 * Print the pointer JavaScript data.
+	 *
+	 * @since 3.3.0
+	 *
+	 * @static
+	 *
+	 * @param string $pointer_id The pointer ID.
+	 * @param string $selector The HTML elements, on which the pointer should be attached.
+	 * @param array  $args Arguments to be passed to the pointer JS (see wp-pointer.js).
+	 */
+	private static function print_js( $pointer_id, $selector, $args ) {
+		if ( empty( $pointer_id ) || empty( $selector ) || empty( $args ) || empty( $args['content'] ) )
+			return;
+
+		?>
+		<script type="text/javascript">
+		(function($){
+			var options = <?php echo wp_json_encode( $args ); ?>, setup;
+
+			if ( ! options )
+				return;
+
+			options = $.extend( options, {
+				close: function() {
+					$.post( ajaxurl, {
+						pointer: '<?php echo $pointer_id; ?>',
+						action: 'dismiss-wp-pointer'
+					});
+				}
+			});
+
+			setup = function() {
+				$('<?php echo $selector; ?>').first().pointer( options ).pointer('open');
+			};
+
+			if ( options.position && options.position.defer_loading )
+				$(window).bind( 'load.wp-pointers', setup );
+			else
+				$(document).ready( setup );
+
+		})( jQuery );
+		</script>
+		<?php
+	}
+
+	public static function pointer_wp330_toolbar() {}
+	public static function pointer_wp330_media_uploader() {}
+	public static function pointer_wp330_saving_widgets() {}
+	public static function pointer_wp340_customize_current_theme_link() {}
+	public static function pointer_wp340_choose_image_from_library() {}
+	public static function pointer_wp350_media() {}
+	public static function pointer_wp360_revisions() {}
+	public static function pointer_wp360_locks() {}
+	public static function pointer_wp390_widgets() {}
+	public static function pointer_wp410_dfw() {}
+
+	/**
+	 * Display a pointer for the new privacy tools.
+	 *
+	 * @since 4.9.6
+	 */
+	public static function pointer_wp496_privacy() {
+		$content  = '<h3>' . __( 'Personal Data and Privacy' ) . '</h3>';
+		$content .= '<h4>' . __( 'Personal Data Export and Erasure' ) . '</h4>';
+		$content .= '<p>' . __( 'New <strong>Tools</strong> have been added to help you with personal data export and erasure requests.' ) . '</p>';
+		$content .= '<h4>' . __( 'Privacy Policy' ) . '</h4>';
+		$content .= '<p>' . __( 'Create or select your site&#8217;s privacy policy page under <strong>Settings &gt; Privacy</strong> to keep your users informed and aware.' ) . '</p>';
+
+		if ( is_rtl() ) {
+			$position = array(
+				'edge'  => 'right',
+				'align' => 'bottom',
+			);
+		} else {
+			$position = array(
+				'edge'  => 'left',
+				'align' => 'bottom',
+			);
+		}
+
+		$js_args = array(
+			'content'  => $content,
+			'position' => $position,
+			'pointerClass' => 'wp-pointer arrow-bottom',
+			'pointerWidth' => 420,
+		);
+		self::print_js( 'wp496_privacy', '#menu-tools', $js_args );
+	}
+
+	/**
+	 * Prevents new users from seeing existing 'new feature' pointers.
+	 *
+	 * @since 3.3.0
+	 *
+	 * @static
+	 *
+	 * @param int $user_id User ID.
+	 */
+	public static function dismiss_pointers_for_new_users( $user_id ) {
+		add_user_meta( $user_id, 'dismissed_wp_pointers', 'wp496_privacy' );
+	}
+}