Moved prefs::kUserPolicyRefreshRate to component/policy/policy_pref_names.

components/policy/core/common/policy_pref_names.cc

 // 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.
 
 #include "components/policy/core/common/policy_pref_names.h"
 
 namespace policy {
-namespace prefs {
+namespace policy_prefs {
 
 // 64-bit serialization of the time last policy usage statistics were collected
 // by UMA_HISTOGRAM_ENUMERATION.
 const char kLastPolicyStatisticsUpdate[] = "policy.last_statistics_update";
 
-}  // namespace prefs
+// Integer that specifies the policy refresh rate for user-policy in
+// milliseconds. Not all values are meaningful, so it is clamped to a sane range
+// by the cloud policy subsystem.
+const char kUserPolicyRefreshRate[] = "policy.user_refresh_rate";
+
+}  // namespace policy_prefs
 }  // namespace policy