ui/base/models: Fix the API example code comment.

ui/base/models/tree_node_model.h

 // Copyright (c) 2011 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.
 
 #ifndef UI_BASE_MODELS_TREE_NODE_MODEL_H_
 #define UI_BASE_MODELS_TREE_NODE_MODEL_H_
 #pragma once
 
 #include <algorithm>
 #include <vector>
@@ skipping 20 matching lines @@
 // yourself any time you make any change directly to the TreeNodes. For example,
 // if you directly invoke set_title on a node it does not notify the observer,
 // you will need to do it yourself. This includes the following methods: Add,
 // Remove and set_title. TreeNodeModel provides cover methods that mutate the
 // TreeNodes and notify the observer. If you are using TreeNodes with a
 // TreeNodeModel use the cover methods to save yourself the headache.
 //
 // The following example creates a TreeNode with two children and then
 // creates a TreeNodeModel from it:
 //
-// TreeNodeWithValue<int> root;
-// root.Add(new TreeNodeWithValue<int>(ASCIIToUTF16("child 1"), 0));
-// root.Add(new TreeNodeWithValue<int>(ASCIIToUTF16("child 2"), 1));
-// TreeNodeModel<TreeNodeWithValue<int> > model(&root);
+// TreeNodeWithValue<int>* root = new TreeNodeWithValue<int>();
+// root->Add(new TreeNodeWithValue<int>(ASCIIToUTF16("child 1"), 0));
+// root->Add(new TreeNodeWithValue<int>(ASCIIToUTF16("child 2"), 1));
+// TreeNodeModel<TreeNodeWithValue<int> > model(root);
 //
 // Two variants of TreeNode are provided here:
 //
 // . TreeNode itself is intended for subclassing. It has one type parameter
 //   that corresponds to the type of the node. When subclassing use your class
 //   name as the type parameter, eg:
 //   class MyTreeNode : public TreeNode<MyTreeNode> .
 // . TreeNodeWithValue is a trivial subclass of TreeNode that has one type
 //   type parameter: a value type that is associated with the node.
 //
@@ skipping 234 matching lines @@
 
   // The root.
   scoped_ptr<NodeType> root_;
 
   DISALLOW_COPY_AND_ASSIGN(TreeNodeModel);
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_MODELS_TREE_NODE_MODEL_H_