MD Settings: Search Engine: Call iron-list notifyResize

chrome/browser/resources/settings/search_engines_page/search_engines_page.html

 <link rel="import" href="chrome://resources/html/action_link.html">
 <link rel="import" href="chrome://resources/html/cr.html">
 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/cr_elements/cr_expand_button/cr_expand_button.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-collapse/iron-collapse.html">
 <link rel="import" href="chrome://resources/html/web_ui_listener_behavior.html">
 <link rel="import" href="/search_engines_page/search_engines_browser_proxy.html">
 <link rel="import" href="/search_engines_page/search_engine_dialog.html">
 <link rel="import" href="/search_engines_page/search_engines_list.html">
 <link rel="import" href="/search_engines_page/omnibox_extension_entry.html">
@@ skipping 31 matching lines @@
     <settings-search-engines-list engines="[[otherEngines]]">
       <a class="list-item list-button" is="action-link"
           on-tap="onAddSearchEngineTap_" id="addSearchEngine">
           $i18n{searchEnginesAddSearchEngine}</a>
     </settings-search-engines-list>
 
     <template is="dom-if" if="[[showExtensionsList_]]">
       <div class="settings-box first">
         <h2>$i18n{searchEnginesExtension}</h2>
       </div>
-      <iron-list items="[[extensions]]" class="extension-engines" selectable>
+      <iron-list id="extensions" class="extension-engines" selectable
+          items="[[extensions]]">
         <template>
           <settings-omnibox-extension-entry engine="[[item]]"
               tabindex$="[[tabIndex]]">
           </settings-omnibox-extension-entry>
         </template>
       </iron-list>
     </template>
   </template>
   <script src="search_engines_page.js"></script>
 </dom-module>