Use the managed bookmarks icon for its folder in views.

chrome/browser/ui/views/bookmarks/bookmark_menu_delegate.h

 // Copyright (c) 2012 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 CHROME_BROWSER_UI_VIEWS_BOOKMARKS_BOOKMARK_MENU_DELEGATE_H_
 #define CHROME_BROWSER_UI_VIEWS_BOOKMARKS_BOOKMARK_MENU_DELEGATE_H_
 
 #include <map>
 #include <set>
 
@@ skipping 132 matching lines @@
   // Invokes BuildMenuForPermanentNode() for the permanent nodes (excluding
   // 'other bookmarks' folder).
   void BuildMenusForPermanentNodes(views::MenuItemView* menu,
                                    int* next_menu_id);
 
   // If |node| has children a new menu is created and added to |menu| to
   // represent it. If |node| is not empty and |added_separator| is false, a
   // separator is added before the new menu items and |added_separator| is set
   // to true.
   void BuildMenuForPermanentNode(const BookmarkNode* node,
+                                 int icon_resource_id,
                                  views::MenuItemView* menu,
                                  int* next_menu_id,
                                  bool* added_separator);
 
   void BuildMenuForManagedNode(views::MenuItemView* menu,
                                int* next_menu_id);
 
   // Creates an entry in menu for each child node of |parent| starting at
   // |start_child_index|.
   void BuildMenu(const BookmarkNode* parent,
@@ skipping 43 matching lines @@
   // Is the model being changed?
   bool is_mutating_model_;
 
   // The location where this bookmark menu will be displayed (for UMA).
   BookmarkLaunchLocation location_;
 
   DISALLOW_COPY_AND_ASSIGN(BookmarkMenuDelegate);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_BOOKMARKS_BOOKMARK_MENU_DELEGATE_H_