Enable the ManagedBookmarks policy on all platforms.

components/bookmarks/common/bookmark_pref_names.cc

 // Copyright 2014 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.
 
 #include "components/bookmarks/common/bookmark_pref_names.h"
 
 namespace prefs {
 
 // Boolean which specifies the ids of the bookmark nodes that are expanded in
 // the bookmark editor.
 const char kBookmarkEditorExpandedNodes[] = "bookmark_editor.expanded_nodes";
 
 // Boolean which specifies whether the bookmark bar is visible on all tabs.
 const char kShowBookmarkBar[] = "bookmark_bar.show_on_all_tabs";
 
 // Modifying bookmarks is completely disabled when this is set to false.
 const char kEditBookmarksEnabled[] = "bookmarks.editing_enabled";
 
 // Boolean which specifies whether the apps shortcut is visible on the bookmark
 // bar.
 const char kShowAppsShortcutInBookmarkBar[] = "bookmark_bar.show_apps_shortcut";
 
+// A list of bookmarks to include in a Managed Bookmarks root node. Each
+// list item is a dictionary containing a "name" and an "url" entry, detailing
+// the bookmark name and target URL respectively.
+const char kManagedBookmarks[] = "bookmarks.managed_bookmarks";
+
 }  // namespace prefs