Add support for custom entries in <cr_network_select/>.

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

 <link rel="import" href="chrome://resources/html/polymer.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-spinner/paper-spinner.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-toggle-button/paper-toggle-button.html">
 <link rel="import" href="chrome://resources/cr_elements/cr_expand_button/cr_expand_button.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/cr_elements/network/cr_network_list_network_item.html">
 <link rel="import" href="/settings_shared_css.html">
 
 <dom-module name="network-summary-item">
   <template>
     <style include="settings-shared">
       :host {
         --cr-network-icon-mixin: {
           height: 24px;
           left: -4px;
           width: 24px;
@@ skipping 23 matching lines @@
         -webkit-margin-start: 10px;
       }
 
       #networkList {
         margin: 5px 0 10px;
         max-height: 400px;
       }
     </style>
     <div class="settings-box two-line" hidden$="[[isHidden]]">
       <div id="details" class="start" on-tap="onDetailsTap_" actionable>
-        <cr-network-list-item id="detailsItem" network-state="[[networkState]]">
-        </cr-network-list-item>
+        <cr-network-list-network-item id="detailsItem" network-state="[[networkState]]" show-buttons>
+        </cr-network-list-network-item>
         <paper-spinner active="[[showScanning_(deviceState, expanded)]]">
         </paper-spinner>
       </div>
       <div>
         <div id="buttons" class="layout horizontal">
           <cr-expand-button id="expandListButton"
               class$="[[getExpandButtonClass_(deviceState, networkStateList)]]"
               expanded="{{expanded}}">
           </cr-expand-button>
           <paper-toggle-button id="deviceEnabledButton"
               checked="[[deviceIsEnabled_(deviceState)]]"
               class$="[[getDeviceEnabledButtonClass_(deviceState)]]"
               on-tap="onDeviceEnabledTap_">
           </paper-toggle-button>
         </div>
       </div>
     </div>
     <template is="dom-if" if="[[expanded]]">
       <div class="list-frame">
         <cr-network-list id="networkList"
             max-height="[[maxHeight]]"
             networks="[[networkStateList]]"
-            opened="{{expanded}}">
+            opened="{{expanded}}"
+            show-buttons>
         </cr-network-list>
         <div class="layout horizontal">
           <paper-button
               hidden$="[[!showKnownNetworks_(networkState, expanded)]]"
               on-tap="onKnownNetworksTap_">
             Known networks
           </paper-button>
         </div>
       </div>
     </template>
   </template>
   <script src="network_summary_item.js"></script>
 </dom-module>