MD Bookmarks: Implement search and selection in new data flow system

chrome/test/data/webui/md_bookmarks/item_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.
 
 suite('<bookmarks-item>', function() {
   var item;
   var store;
   var TEST_ITEM = createItem('0');
 
   setup(function() {
     store = new bookmarks.TestStore({
-      nodes: testTree(createFolder('1', [createItem(['0'])])),
+      nodes: testTree(createFolder('1', [createItem(['2'])])),
     });
     bookmarks.Store.instance_ = store;
 
     item = document.createElement('bookmarks-item');
-    item.itemId = '0';
+    item.itemId = '2';
     replaceBody(item);
   });
 
   test('changing the url changes the favicon', function() {
     var favicon = item.$.icon.style.backgroundImage;
-    store.data.nodes['0'] = createItem('0', {url: 'https://mail.google.com'});
+    store.data.nodes['2'] = createItem('0', {url: 'https://mail.google.com'});
     store.notifyObservers();
     assertNotEquals(favicon, item.$.icon.style.backgroundImage);
   });
 
   test('changing to folder hides/unhides the folder/icon', function() {
     // Starts test as an item.
     assertTrue(item.$['folder-icon'].hidden);
     assertFalse(item.$.icon.hidden);
 
     // Change to a folder.
     item.itemId = '1';
 
     assertFalse(item.$['folder-icon'].hidden);
     assertTrue(item.$.icon.hidden);
   });
 });