Add controlled setting indicator for default search engine configuration

chrome/browser/resources/options/search_engine_manager_engine_list.js

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 cr.define('options.search_engines', function() {
+  /** @const */ var ControlledSettingIndicator =
+                    options.ControlledSettingIndicator;
   /** @const */ var InlineEditableItemList = options.InlineEditableItemList;
   /** @const */ var InlineEditableItem = options.InlineEditableItem;
   /** @const */ var ListSelectionController = cr.ui.ListSelectionController;
 
   /**
    * Creates a new search engine list item.
    * @param {Object} searchEnigne The search engine this represents.
    * @constructor
    * @extends {cr.ui.ListItem}
    */
@@ skipping 114 matching lines @@
         makeDefaultButtonEl.onclick = function(e) {
           chrome.send('managerSetDefaultSearchEngine', [engine.modelIndex]);
         };
         // Don't select the row when clicking the button.
         makeDefaultButtonEl.onmousedown = function(e) {
           e.stopPropagation();
         };
         urlWithButtonEl.appendChild(makeDefaultButtonEl);
       }
 
+      if (engine.controlledBy == 'policy') {
+        this.querySelector('.row-delete-button').hidden = true;
+        var indicator = ControlledSettingIndicator();
+        indicator.setAttribute('setting', 'search-engine');
+        // Create a synthetic pref change event decorated as
+        // CoreOptionsHandler::CreateValueForPref() does.
+        var event = new cr.Event(this.contentType);
+        event.value = { controlledBy: engine.controlledBy };
+        indicator.handlePrefChange(event);
+        this.appendChild(indicator);
+      }
+
       // Do final adjustment to the input fields.
       this.nameField_ = nameEl.querySelector('input');
       // The editable field uses the raw name, not the display name.
       this.nameField_.value = engine.name;
       this.keywordField_ = keywordEl.querySelector('input');
       this.urlField_ = urlEl.querySelector('input');
 
       if (engine.urlLocked)
         this.urlField_.disabled = true;
 
@@ skipping 158 matching lines @@
     },
   };
 
   // Export
   return {
     SearchEngineList: SearchEngineList
   };
 
 });