Add back icon and route class for backward compatible purpose

src/components/com_weblinks/helpers/icon.php

@@ -0,0 +1,55 @@
+<?php
+/**
+ * @package     Joomla.Site
+ * @subpackage  com_weblinks
+ *
+ * @copyright   Copyright (C) 2005 - 2017 Open Source Matters, Inc. All rights reserved.
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+defined('_JEXEC') or die;
+
+/**
+ * Weblink Component HTML Helper.
+ *
+ * @since  1.5
+ */
+class JHtmlIcon
+{
+	/**
+	 * Create a link to create a new weblink
+	 *
+	 * @param   mixed  $weblink  Unused
+	 * @param   mixed  $params   Unused
+	 *
+	 * @return  string
+	 */
+	public static function create($category, $params)
+	{
+		return self::getIcon()->create($category, $params);
+	}
+
+	/**
+	 * Create a link to edit an existing weblink
+	 *
+	 * @param   object                     $weblink  Weblink data
+	 * @param   \Joomla\Registry\Registry  $params   Item params
+	 * @param   array                      $attribs  Unused
+	 *
+	 * @return  string
+	 */
+	public static function edit($weblink, $params, $attribs = array())
+	{
+		return self::getIcon()->edit($weblink, $params, $attribs);
+	}
+
+	/**
+	 * Creates an icon instance.
+	 *
+	 * @return  \Joomla\Component\Weblinks\Administrator\Service\HTML\Icon
+	 */
+	private static function getIcon()
+	{
+		return (new \Joomla\Component\Weblinks\Administrator\Service\HTML\Icon(Joomla\CMS\Factory::getApplication()));
+	}
+}

src/components/com_weblinks/helpers/route.php

@@ -0,0 +1,22 @@
+<?php
+/**
+ * @package     Joomla.Site
+ * @subpackage  com_weblinks
+ *
+ * @copyright   Copyright (C) 2005 - 2017 Open Source Matters, Inc. All rights reserved.
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+defined('_JEXEC') or die;
+
+use Joomla\Component\Weblinks\Site\Helper\RouteHelper;
+
+/**
+ * Weblinks Component Route Helper.
+ *
+ * @since  1.5
+ */
+abstract class WeblinksHelperRoute extends RouteHelper
+{
+
+}