Add controlled setting indicator for default search engine configuration

chrome/browser/resources/options/search_engine_manager_engine_list.js

Index: chrome/browser/resources/options/search_engine_manager_engine_list.js
diff --git a/chrome/browser/resources/options/search_engine_manager_engine_list.js b/chrome/browser/resources/options/search_engine_manager_engine_list.js
index ae9e5a8a669a6e6ad916eb3f8b4fb0c0cf188d33..fb0045b395d22b0f2597a9e033623719a671f1fd 100644
--- a/chrome/browser/resources/options/search_engine_manager_engine_list.js
+++ b/chrome/browser/resources/options/search_engine_manager_engine_list.js
@@ -3,6 +3,8 @@
 // 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;
@@ -137,6 +139,18 @@ cr.define('options.search_engines', function() {
         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.