WP_Comments_List_Table::get_bulk_actions()

	protected function get_bulk_actions() {
		global $comment_status;

		$actions = array();
		if ( in_array( $comment_status, array( 'all', 'approved' ) ) )
			$actions['unapprove'] = __( 'Unapprove' );
		if ( in_array( $comment_status, array( 'all', 'moderated' ) ) )
			$actions['approve'] = __( 'Approve' );
		if ( in_array( $comment_status, array( 'all', 'moderated', 'approved', 'trash' ) ) )
			$actions['spam'] = _x( 'Mark as Spam', 'comment' );

		if ( 'trash' === $comment_status ) {
			$actions['untrash'] = __( 'Restore' );
		} elseif ( 'spam' === $comment_status ) {
			$actions['unspam'] = _x( 'Not Spam', 'comment' );
		}

		if ( in_array( $comment_status, array( 'trash', 'spam' ) ) || !EMPTY_TRASH_DAYS )
			$actions['delete'] = __( 'Delete Permanently' );
		else
			$actions['trash'] = __( 'Move to Trash' );

		return $actions;
	}