Remove wstrings from bookmarks, part 9.

app/tree_node_model.h

 // Copyright (c) 2010 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 APP_TREE_NODE_MODEL_H_
 #define APP_TREE_NODE_MODEL_H_
 #pragma once
 
 #include <algorithm>
 #include <string>
@@ skipping 255 matching lines @@
     DCHECK(node);
     return AsNode(node)->GetParent();
   }
 
   NodeType* AsNode(TreeModelNode* model_node) {
     return static_cast<NodeType*>(model_node);
   }
 
   // Sets the title of the specified node.
   virtual void SetTitle(TreeModelNode* node,
-                        const std::wstring& title) {
+                        const string16& title) {
     DCHECK(node);
-    AsNode(node)->SetTitle(WideToUTF16Hack(title));
+    AsNode(node)->SetTitle(title);
     NotifyObserverTreeNodeChanged(node);
   }
 
   void Add(NodeType* parent, int index, NodeType* child) {
     DCHECK(parent && child);
     parent->Add(index, child);
     NotifyObserverTreeNodesAdded(parent, index, 1);
   }
 
   NodeType* Remove(NodeType* parent, int index) {
@@ skipping 27 matching lines @@
  private:
   // The observers.
   ObserverList<TreeModelObserver> observer_list_;
   // The root.
   scoped_ptr<NodeType> root_;
 
   DISALLOW_COPY_AND_ASSIGN(TreeNodeModel);
 };
 
 #endif  // APP_TREE_NODE_MODEL_H_