[MD settings] show icon when content settings are controlled by an extension

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

 <link rel="import" href="chrome://resources/cr_elements/cr_dialog/cr_dialog.html">
 <link rel="import" href="chrome://resources/cr_elements/network/cr_onc_types.html">
 <link rel="import" href="chrome://resources/cr_elements/policy/cr_policy_network_behavior.html">
 <link rel="import" href="chrome://resources/cr_elements/policy/cr_policy_network_indicator.html">
 <link rel="import" href="chrome://resources/html/i18n_behavior.html">
 <link rel="import" href="chrome://resources/html/md_select_css.html">
 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-a11y-keys/iron-a11y-keys.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-input/paper-input-container.html">
@@ skipping 41 matching lines @@
         padding: 10px 0;
       }
     </style>
 
     <!-- Policy indicator. Only one dom-if below will be shown. -->
     <template is="dom-if"
         if="[[shouldShowNetworkPolicyIndicator_(networkProperties)]]">
       <div class="settings-box continuation single-column">
         <div class="layout horizontal center">
           <cr-policy-network-indicator
-              property="[[networkProperties.ProxySettings.Type]]">
+              property="[[networkProperties.ProxySettings.Type]]"
+              ignore-extensions>
           </cr-policy-network-indicator>
           <div>$i18n{networkProxyEnforcedPolicy}</div>
         </div>
       </div>
     </template>
     <template is="dom-if"
         if="[[shouldShowExtensionIndicator_(networkProperties)]]">
       <div class="settings-box continuation single-column">
         <extension-controlled-indicator
             extension-id="[[prefs.proxy.extensionId]]"
@@ skipping 142 matching lines @@
         </paper-button>
         <paper-button class="action-button"
             on-tap="onAllowSharedDialogConfirm_">
           $i18n{confirm}
         </paper-button>
       </div>
     </dialog>
   </template>
   <script src="network_proxy.js"></script>
 </dom-module>