MD Settings: Internet: Hide subpage arrow when disabled

chrome/browser/resources/settings/internet_page/network_summary_item.html

 <link rel="import" href="chrome://resources/cr_elements/cr_expand_button/cr_expand_button.html">
 <link rel="import" href="chrome://resources/cr_elements/icons.html">
 <link rel="import" href="chrome://resources/cr_elements/network/cr_network_list.html">
 <link rel="import" href="chrome://resources/cr_elements/network/cr_network_list_item.html">
 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-a11y-keys-behavior/iron-a11y-keys-behavior.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-collapse/iron-collapse.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-spinner/paper-spinner.html">
@@ skipping 59 matching lines @@
         </network-siminfo>
       </template>
 
       <div id="buttons" class="layout horizontal">
         <template is="dom-if"
             if="[[expandIsVisible_(deviceState, networkStateList)]]">
           <cr-expand-button id="expandListButton" expanded="{{expanded_}}">
           </cr-expand-button>
         </template>
         <template is="dom-if"
-            if="[[!expandIsVisible_(deviceState, networkStateList)]]">
+            if="[[showDetailsIsVisible_(deviceState, networkStateList)]]">
           <button class="subpage-arrow" is="paper-icon-button-light"
               on-tap="onShowDetailsTap_">
           </button>
         </template>
       </div>
 
       <template is="dom-if" if="[[enableIsVisible_(deviceState)]]">
         <div class="secondary-action">
           <paper-toggle-button  id="deviceEnabledButton"
               checked="[[deviceIsEnabled_(deviceState)]]"
@@ skipping 16 matching lines @@
             <div class="button-row" actionable on-tap="onKnownNetworksTap_">
               <a is="action-link">$i18n{knownNetworksButton}</a>
             </div>
           </template>
         </div>
       </iron-collapse>
     </template>
   </template>
   <script src="network_summary_item.js"></script>
 </dom-module>