MD Settings: add unit tests for <extension-controlled-indicator>

chrome/browser/resources/settings/controls/extension_controlled_indicator.html

 <link rel="import" href="chrome://resources/html/i18n_behavior.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="/extension_control_browser_proxy.html">
+<link rel="import" href="/i18n_setup.html">
+<link rel="import" href="/settings_shared_css.html">
 
 <dom-module id="extension-controlled-indicator">
   <template>
     <style include="settings-shared">
       :host {
         -webkit-margin-start: 36px;
         align-items: center;
         display: flex;
         min-height: var(--settings-row-min-height);
       }
 
       img {
         -webkit-margin-end: 16px;
         height: var(--settings-icon-size);
         width: var(--settings-icon-size);
       }
 
       span {
         -webkit-margin-end: 8px;
         flex: 1;
       }
     </style>
-    <img src="chrome://extension-icon/[[extensionId]]/40/1">
+    <img role="presentation" src="chrome://extension-icon/[[extensionId]]/40/1">
     <span inner-h-t-m-l="[[getLabel_(extensionId, extensionName)]]"></span>
-    <template is="dom-if" if="[[extensionCanBeDisabled]]">
+    <template is="dom-if" if="[[extensionCanBeDisabled]]" restamp>
       <paper-button class="secondary-button" on-tap="onDisableTap_">
         $i18n{disable}
       </paper-button>
     </template>
   </template>
 </dom-module>
 
 <script src="/controls/extension_controlled_indicator.js"></script>