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 145 matching lines @@
         fields[i].oninput = this.startFieldValidation_.bind(this);
       }
 
       // Listen for edit events.
       if (engine.canBeEdited) {
         this.addEventListener('edit', this.onEditStarted_.bind(this));
         this.addEventListener('canceledit', this.onEditCancelled_.bind(this));
         this.addEventListener('commitedit', this.onEditCommitted_.bind(this));
       } else {
         this.editable = false;
+        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: 'policy' };
+        indicator.handlePrefChange(event);
+        this.appendChild(indicator);
       }
     },
 
     /** @inheritDoc */
     get currentInputIsValid() {
       return !this.waitingForValidation_ && this.currentlyValid_;
     },
 
     /** @inheritDoc */
     get hasBeenEdited() {
@@ skipping 127 matching lines @@
     },
   };
 
   // Export
   return {
     SearchEngineList: SearchEngineList
   };
 
 });