"up-to-date" should only use hyphens when used as compound modifier of a noun

chrome/browser/ui/cocoa/bookmarks/bookmark_menu_bridge.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.
 
 // C++ controller for the bookmark menu; one per AppController (which
 // means there is only one).  When bookmarks are changed, this class
 // takes care of updating Cocoa bookmark menus.  This is not named
 // BookmarkMenuController to help avoid confusion between languages.
 // This class needs to be C++, not ObjC, since it derives from
 // BookmarkModelObserver.
@@ skipping 124 matching lines @@
 
   // Returns the NSMenuItem for a given BookmarkNode.
   NSMenuItem* MenuItemForNode(const bookmarks::BookmarkNode* node);
 
   // Start watching the bookmarks for changes.
   void ObserveBookmarkModel();
 
  private:
   friend class BookmarkMenuBridgeTest;
 
-  // True iff the menu is up-to-date with the actual BookmarkModel.
+  // True iff the menu is up to date with the actual BookmarkModel.
   bool menuIsValid_;
 
   Profile* profile_;  // weak
   BookmarkMenuCocoaController* controller_;  // strong
 
   // The folder image so we can use one copy for all.
   base::scoped_nsobject<NSImage> folder_image_;
 
   // In order to appropriately update items in the bookmark menu, without
   // forcing a rebuild, map the model's nodes to menu items.
   std::map<const bookmarks::BookmarkNode*, NSMenuItem*> bookmark_nodes_;
 };
 
 #endif  // CHROME_BROWSER_UI_COCOA_BOOKMARKS_BOOKMARK_MENU_BRIDGE_H_