Allow policy refresh rate to be configured through policy.

chrome/browser/policy/device_management_policy_cache.cc

Index: chrome/browser/policy/device_management_policy_cache.cc
diff --git a/chrome/browser/policy/device_management_policy_cache.cc b/chrome/browser/policy/device_management_policy_cache.cc
index ff072eb150ccdba466aa128378e897c35b829e96..75f72bf4ce746dfc5cdf07470cebafcd1bf190d8 100644
--- a/chrome/browser/policy/device_management_policy_cache.cc
+++ b/chrome/browser/policy/device_management_policy_cache.cc
@@ -138,26 +138,18 @@ DictionaryValue* DeviceManagementPolicyCache::GetPolicy() {
   return policy_->DeepCopy();
 }
 
-void DeviceManagementPolicyCache::SetDeviceUnmanaged(bool is_device_unmanaged) {
-  if (is_device_unmanaged_ == is_device_unmanaged)
-    return;
-
-  is_device_unmanaged_ = is_device_unmanaged;
+void DeviceManagementPolicyCache::SetDeviceUnmanaged() {
+  is_device_unmanaged_ = true;
   base::Time now(base::Time::NowFromSystemTime());
-  DictionaryValue* empty = new DictionaryValue();
   {
     AutoLock lock(lock_);
-    policy_.reset(empty);
+    policy_.reset(new DictionaryValue);
     last_policy_refresh_time_ = now;
   }
   BrowserThread::PostTask(
       BrowserThread::FILE,
       FROM_HERE,
-      new PersistPolicyTask(backing_file_path_,
-                            (is_device_unmanaged ? NULL
-                                : new em::DevicePolicyResponse()),
-                            now,
-                            is_device_unmanaged_));
+      new PersistPolicyTask(backing_file_path_, NULL, now, true));
 }
 
 // static