Remove PrefObserver usage, batch 9.

chrome/browser/policy/cloud_policy_refresh_scheduler.cc

Index: chrome/browser/policy/cloud_policy_refresh_scheduler.cc
diff --git a/chrome/browser/policy/cloud_policy_refresh_scheduler.cc b/chrome/browser/policy/cloud_policy_refresh_scheduler.cc
index 6397f8e93a1161270b92e3373bbdaf943fbba4f0..8132be5dae4cdcacf51f94614836707678e08a51 100644
--- a/chrome/browser/policy/cloud_policy_refresh_scheduler.cc
+++ b/chrome/browser/policy/cloud_policy_refresh_scheduler.cc
@@ -37,7 +37,10 @@ CloudPolicyRefreshScheduler::CloudPolicyRefreshScheduler(
   store_->AddObserver(this);
   net::NetworkChangeNotifier::AddIPAddressObserver(this);
 
-  refresh_delay_.Init(refresh_pref.c_str(), prefs, this);
+  refresh_delay_.Init(
+      refresh_pref.c_str(), prefs,
+      base::Bind(&CloudPolicyRefreshScheduler::ScheduleRefresh,
+                 base::Unretained(this)));
 
   UpdateLastRefreshFromPolicy();
   ScheduleRefresh();
@@ -99,14 +102,6 @@ void CloudPolicyRefreshScheduler::OnStoreError(CloudPolicyStore* store) {
   // error is required. NB: Changes to is_managed fire OnStoreLoaded().
 }
 
-void CloudPolicyRefreshScheduler::OnPreferenceChanged(
-    PrefServiceBase* service,
-    const std::string& pref_name) {
-  DCHECK_EQ(refresh_delay_.GetPrefName(), pref_name);
-
-  ScheduleRefresh();
-}
-
 void CloudPolicyRefreshScheduler::OnIPAddressChanged() {
   if (client_->status() == DM_STATUS_REQUEST_FAILED)
     RefreshAfter(0);