MD Bookmarks: Add 'Open' command, to open in either the BMM or in new tabs

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(['2']),
-            createItem(['3']),
+            createItem('2', {url: 'http://example.com/'}),
+            createItem('3'),
           ])),
     });
     bookmarks.Store.instance_ = store;
 
     item = document.createElement('bookmarks-item');
     item.itemId = '2';
     replaceBody(item);
   });
 
   test('changing the url changes the favicon', function() {
@@ skipping 26 matching lines @@
     item.isSelectedItem_ = true;
     item.dispatchEvent(new MouseEvent('contextmenu'));
     assertEquals(null, store.lastAction);
 
     item.isSelectedItem_ = false;
     item.dispatchEvent(new MouseEvent('contextmenu'));
     assertDeepEquals(
         bookmarks.actions.selectItem('2', false, false, store.data),
         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);
+  });
 });