Use std::unique_ptr to express ownership of base::Value in PolicyMap::Entry

components/policy/core/common/cloud/component_cloud_policy_store.cc

 // Copyright (c) 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.
 
 #include "components/policy/core/common/cloud/component_cloud_policy_store.h"
 
 #include <stddef.h>
 #include <utility>
 
 #include "base/callback.h"
@@ skipping 342 matching lines @@
     std::string level_string;
     if (description->GetStringWithoutPathExpansion(kLevel, &level_string) &&
         level_string == kRecommended) {
       level = POLICY_LEVEL_RECOMMENDED;
     }
 
     // If policy for components is ever used for device-level settings then
     // this must support a configurable scope; assuming POLICY_SCOPE_USER is
     // fine for now.
     policy->Set(it.key(), level, POLICY_SCOPE_USER, POLICY_SOURCE_CLOUD,
-                value.release(), nullptr);
+                std::move(value), nullptr);
   }
 
   return true;
 }
 
 }  // namespace policy