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

components/drive/chromeos/sync_client.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 COMPONENTS_DRIVE_CHROMEOS_SYNC_CLIENT_H_
 #define COMPONENTS_DRIVE_CHROMEOS_SYNC_CLIENT_H_
 
 #include <map>
 #include <memory>
 #include <string>
@@ skipping 62 matching lines @@
   // Returns false if no task is found for the spcecified ID.
   bool WaitForUpdateTaskToComplete(const std::string& local_id,
                                    const FileOperationCallback& callback);
 
   // Starts processing the backlog (i.e. pinned-but-not-filed files and
   // dirty-but-not-uploaded files). Kicks off retrieval of the local
   // IDs of these files, and then starts the sync loop.
   void StartProcessingBacklog();
 
   // Starts checking the existing pinned files to see if these are
-  // up-to-date. If stale files are detected, the local IDs of these files
+  // up to date. If stale files are detected, the local IDs of these files
   // are added and the sync loop is started.
   void StartCheckingExistingPinnedFiles();
 
   // Sets a delay for testing.
   void set_delay_for_testing(const base::TimeDelta& delay) {
     delay_ = delay;
   }
 
  private:
   // Types of sync tasks.
@@ skipping 98 matching lines @@
   // invalidate its weak pointers before any other members are destroyed.
   base::WeakPtrFactory<SyncClient> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncClient);
 };
 
 }  // namespace internal
 }  // namespace drive
 
 #endif  // COMPONENTS_DRIVE_CHROMEOS_SYNC_CLIENT_H_