MD Settings: extension-controlled indicators for default search engine

chrome/test/data/webui/settings/search_page_test.js

 // Copyright 2016 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('settings_search_page', function() {
   function generateSearchEngineInfo() {
     var searchEngines0 = settings_search.createSampleSearchEngine(
         true, false, false);
     searchEngines0.default = true;
     var searchEngines1 = settings_search.createSampleSearchEngine(
@@ skipping 55 matching lines @@
           Polymer.dom.flush();
           assertEquals(2, selectElement.selectedIndex);
 
           browserProxy.whenCalled('setDefaultSearchEngine').then(function() {
             // Since the change happened in a different tab, there should be no
             // new call to |setDefaultSearchEngine|.
             assertNotReached('Should not call setDefaultSearchEngine again');
           });
         });
       });
+
+      test('ControlledByExtension', function() {
+        return browserProxy.whenCalled('getSearchEnginesList').then(function() {
+          var selectElement = page.$$('select');
+          assertFalse(selectElement.disabled);
+          assertFalse(!!page.$$('extension-controlled-indicator'));
+
+          page.prefs = {
+            default_search_provider: {
+              enabled: {
+                controlledBy: chrome.settingsPrivate.ControlledBy.EXTENSION,
+                controlledByName: 'fake extension name',
+                enforcement: chrome.settingsPrivate.Enforcement.ENFORCED,
+                extensionId: 'fake extension id',
+                extensionCanBeDisabled: true,
+                value: true,
+              },
+            },
+          };
+          Polymer.dom.flush();
+
+          assertTrue(selectElement.disabled);
+          assertTrue(!!page.$$('extension-controlled-indicator'));
+        });
+      });
     });
   }
 
   return {
     registerTests: registerTests,
   };
 });