MD Settings: Internet: Clean up SIM info and dialog

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

 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-collapse/iron-collapse.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-flex-layout/classes/iron-flex-layout.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-checkbox/paper-checkbox.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-icon-button/paper-icon-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/icons.html">
 <link rel="import" href="chrome://resources/cr_elements/network/cr_network_icon.html">
 <link rel="import" href="chrome://resources/cr_elements/network/cr_onc_types.html">
@@ skipping 107 matching lines @@
         <paper-checkbox checked="{{autoConnect}}">
           Automatically connect to this network
         </paper-checkbox>
         <cr-policy-network-indicator
             property="[[getManagedAutoConnect_(networkProperties)]]">
         </cr-policy-network-indicator>
       </div>
     </div>
 
     <!-- SIM Info (Cellular only). -->
-    <div class="settings-box self-stretch"
-        hidden$="[[!showCellularSim_(networkProperties)]]">
-      <network-siminfo editable network-properties="[[networkProperties]]"
-          on-siminfo-change="onNetworkPropertyChange_"
-          networking-private="[[networkingPrivate]]">
-      </network-siminfo>
-    </div>
+    <network-siminfo
+        editable on-siminfo-change="onNetworkPropertyChange_"
+        hidden$="[[!showCellularSim_(networkProperties)]]"
+        network-properties="[[networkProperties]]"
+        networking-private="[[networkingPrivate]]">
+    </network-siminfo>
 
     <!-- IP Address. -->
     <div class="settings-box two-line single-column" hidden$="[[!IPAddress]]">
       <div>IP Address</div>
       <div class="secondary">[[IPAddress]]</div>
     </div>
 
     <!-- Properties to always show if present. -->
     <network-property-list hidden$="[[!hasInfoFields_(networkProperties)]]"
         fields="[[getInfoFields_(networkProperties)]]"
@@ skipping 50 matching lines @@
         <!-- Proxy -->
         <div class="subtitle">Proxy</div> 
         <network-proxy editable on-proxy-change="onProxyChange_"
             network-properties="[[networkProperties]]">
         </network-proxy>
       </div>
     </iron-collapse>
   </template>
   <script src="internet_detail_page.js"></script>
 </dom-module>