[MD Bookmarks] Add keyboard navigation and selection to bookmark list.

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() {
@@ skipping 50 matching lines @@
     item.isSelectedItem_ = false;
     item.dispatchEvent(new MouseEvent('contextmenu'));
     assertDeepEquals(
         bookmarks.actions.selectItem('2', store.data, {
           clear: true,
           range: false,
           toggle: false,
         }),
         store.lastAction);
   });
-
-  test('anchor tag updates with item url', function() {
-    assertEquals('http://example.com/', item.$.url.href);
-
-    store.data.nodes['2'] = createItem('0', {url: 'https://mail.google.com'});
-    store.notifyObservers();
-    assertEquals('https://mail.google.com/', item.$.url.href);
-
-    // Change to a folder.
-    item.itemId = '1';
-    assertEquals('chrome://bookmarks/?id=1', item.$.url.href);
-  });
 });