[MD settings] use arrow-forward to switch direction in rtl

chrome/browser/resources/settings/site_settings/site_list.html

 <link rel="import" href="chrome://resources/cr_elements/icons.html">
 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/html/web_ui_listener_behavior.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-icon/iron-icon.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-button/paper-button.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-icon-button/paper-icon-button.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-icon-button/paper-icon-button-light.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-menu/paper-menu.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-menu/paper-submenu.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-menu-button/paper-menu-button.html">
@@ skipping 71 matching lines @@
                     menu-value$="[[PermissionValues.SESSION_ONLY]]">
                   $i18n{siteSettingsActionSessionOnly}
                 </paper-item>
                 <paper-item
                     menu-value$="[[PermissionValues.DEFAULT]]" actionable>
                   $i18n{siteSettingsActionReset}
                 </paper-item>
               </paper-menu>
             </paper-menu-button>
             <div on-tap="onOriginTap_" actionable>
-              <button class="icon-arrow-right" is="paper-icon-button-light">
+              <button class="icon-arrow-forward" is="paper-icon-button-light">
               </button>
             </div>
           </div>
         </template>
 
         <template is="dom-if" if="[[!allSites]]">
           <div class="list-item list-button" on-tap="onAddSiteTap_">
             $i18n{addSiteLink}
           </div>
         </template>
       </div>
     </paper-submenu>
   </template>
   <script src="site_list.js"></script>
 </dom-module>