MD Bookmarks: Add basic page features to new data-flow system

chrome/test/data/webui/md_bookmarks/test_util.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.
 
 /**
  * Replace the current body of the test with a new element.
  * @param {Element} element
  */
 function replaceBody(element) {
   PolymerTest.clearBody();
   document.body.appendChild(element);
 }
 
 /**
+ * Convert a tree of bookmark nodes into a normalized lookup table of nodes.
+ */
+function testTree(root) {
+  return bookmarks.util.normalizeNodes(root);
+}
+
+/**
  * Initialize a tree for UI testing. This performs the same initialization as
  * `setUpStore_` in <bookmarks-store>, but without the need for a store element
  * in the test.
  * @param {BookmarkTreeNode} rootNode
  */
 function setupTreeForUITests(rootNode){
   if (!rootNode.path)
     rootNode.path = 'rootNode';
 
   BookmarksStore.generatePaths(rootNode, 0);
@@ skipping 74 matching lines @@
 
   if (config) {
     for (var key in config)
       props[key] = config[key];
   }
 
   element.dispatchEvent(new MouseEvent('mousedown', props));
   element.dispatchEvent(new MouseEvent('mouseup', props));
   element.dispatchEvent(new MouseEvent('click', props));
 }