Allow policy refresh rate to be configured through policy.

chrome/common/pref_names.h

 // Copyright (c) 2010 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.
 
 // Constants for the names of various preferences, for easier changing.
 
 #ifndef CHROME_COMMON_PREF_NAMES_H_
 #define CHROME_COMMON_PREF_NAMES_H_
 #pragma once
 
@@ skipping 213 matching lines @@
 extern const char kAutoFillEnabled[];
 extern const char kAutoFillAuxiliaryProfilesEnabled[];
 extern const char kAutoFillDialogPlacement[];
 extern const char kAutoFillPositiveUploadRate[];
 extern const char kAutoFillNegativeUploadRate[];
 extern const char kAutoFillPersonalDataManagerFirstRun[];
 
 extern const char kUseVerticalTabs[];
 extern const char kEnableTranslate[];
 extern const char kPinnedTabs[];
+extern const char kPolicyRefreshRate[];
 
 // Local state
 extern const char kMetricsClientID[];
 extern const char kMetricsSessionID[];
 extern const char kMetricsClientIDTimestamp[];
 extern const char kMetricsReportingEnabled[];
 extern const char kMetricsInitialLogs[];
 extern const char kMetricsOngoingLogs[];
 
 extern const char kProfileMetrics[];
@@ skipping 191 matching lines @@
 extern const char kAuthNegotiateDelegateWhitelist[];
 extern const char kGSSAPILibraryName[];
 
 extern const char kKnownBackgroundPages[];
 
 extern const char kDisable3DAPIs[];
 
 }  // namespace prefs
 
 #endif  // CHROME_COMMON_PREF_NAMES_H_