Allow policy refresh rate to be configured through policy.

chrome/browser/policy/device_management_policy_cache.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.
 
 #ifndef CHROME_BROWSER_POLICY_DEVICE_MANAGEMENT_POLICY_CACHE_H_
 #define CHROME_BROWSER_POLICY_DEVICE_MANAGEMENT_POLICY_CACHE_H_
 
 #include "base/file_path.h"
 #include "base/gtest_prod_util.h"
 #include "base/lock.h"
@@ skipping 24 matching lines @@
   void LoadPolicyFromFile();
 
   // Resets the policy information. Returns true if the new policy is different
   // from the previously stored policy.
   bool SetPolicy(const em::DevicePolicyResponse& policy);
 
   // Gets the policy information. Ownership of the return value is transferred
   // to the caller.
   DictionaryValue* GetPolicy();
 
-  void SetDeviceUnmanaged(bool is_device_unmanaged);
+  void SetDeviceUnmanaged();
   bool is_device_unmanaged() const {
     return is_device_unmanaged_;
   }
 
   // Returns the time as which the policy was last fetched.
   base::Time last_policy_refresh_time() const {
     return last_policy_refresh_time_;
   }
 
  private:
@@ skipping 29 matching lines @@
 
   bool is_device_unmanaged_;
 
   // The time at which the policy was last refreshed.
   base::Time last_policy_refresh_time_;
 };
 
 }  // namespace policy
 
 #endif  // CHROME_BROWSER_POLICY_DEVICE_MANAGEMENT_POLICY_CACHE_H_