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

chrome/browser/policy/cloud/cloud_policy_invalidator.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 CHROME_BROWSER_POLICY_CLOUD_CLOUD_POLICY_INVALIDATOR_H_
 #define CHROME_BROWSER_POLICY_CLOUD_CLOUD_POLICY_INVALIDATOR_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 195 matching lines @@
   // The object id representing the policy in the invalidation service.
   invalidation::ObjectId object_id_;
 
   // Whether the policy is current invalid. This is set to true when an
   // invalidation is received and reset when the policy fetched due to the
   // invalidation is stored.
   bool invalid_;
 
   // The version of the latest invalidation received. This is compared to
   // the invalidation version of policy stored to determine when the
-  // invalidated policy is up-to-date.
+  // invalidated policy is up to date.
   int64_t invalidation_version_;
 
   // The number of invalidations with unknown version received. Since such
   // invalidations do not provide a version number, this count is used to set
   // invalidation_version_ when such invalidations occur.
   int unknown_version_invalidation_count_;
 
   // The highest invalidation version that was handled already.
   int64_t highest_handled_invalidation_version_;
 
@@ skipping 14 matching lines @@
 
   // WeakPtrFactory used to create callbacks to this object.
   base::WeakPtrFactory<CloudPolicyInvalidator> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(CloudPolicyInvalidator);
 };
 
 }  // namespace policy
 
 #endif  // CHROME_BROWSER_POLICY_CLOUD_CLOUD_POLICY_INVALIDATOR_H_