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

components/omnibox/browser/omnibox_controller.h

 // Copyright 2013 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 COMPONENTS_OMNIBOX_BROWSER_OMNIBOX_CONTROLLER_H_
 #define COMPONENTS_OMNIBOX_BROWSER_OMNIBOX_CONTROLLER_H_
 
 #include <memory>
 
 #include "base/compiler_specific.h"
@@ skipping 14 matching lines @@
 namespace gfx {
 class Rect;
 }
 
 // This class controls the various services that can modify the content
 // for the omnibox, including AutocompleteController and InstantController. It
 // is responsible of updating the omnibox content.
 // TODO(beaudoin): Keep on expanding this class so that OmniboxEditModel no
 //     longer needs to hold any reference to AutocompleteController. Also make
 //     this the point of contact between InstantController and OmniboxEditModel.
-//     As the refactor progresses, keep the class comment up-to-date to
+//     As the refactor progresses, keep the class comment up to date to
 //     precisely explain what this class is doing.
 class OmniboxController : public AutocompleteControllerDelegate {
  public:
   OmniboxController(OmniboxEditModel* omnibox_edit_model,
                     OmniboxClient* client);
   ~OmniboxController() override;
 
   // The |current_url| field of input is only set for mobile ports.
   void StartAutocomplete(const AutocompleteInput& input) const;
 
@@ skipping 44 matching lines @@
   // but the ones specifically needed are unclear. We should therefore spend
   // some time to extract these fields and use a tighter structure here.
   AutocompleteMatch current_match_;
 
   base::WeakPtrFactory<OmniboxController> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(OmniboxController);
 };
 
 #endif  // COMPONENTS_OMNIBOX_BROWSER_OMNIBOX_CONTROLLER_H_