Remove FOR_EACH_OBSERVER macro usage in chrome/browser/supervised_user

chrome/browser/supervised_user/supervised_user_pref_store.cc

Index: chrome/browser/supervised_user/supervised_user_pref_store.cc
diff --git a/chrome/browser/supervised_user/supervised_user_pref_store.cc b/chrome/browser/supervised_user/supervised_user_pref_store.cc
index e0d9d944130ac1846429a9b21f45c513c46140fc..96ba26e218e76b8640cd5f9f971c2c190715f9df 100644
--- a/chrome/browser/supervised_user/supervised_user_pref_store.cc
+++ b/chrome/browser/supervised_user/supervised_user_pref_store.cc
@@ -166,7 +166,8 @@ void SupervisedUserPrefStore::OnNewSettingsAvailable(
   }
 
   if (!old_prefs) {
-    FOR_EACH_OBSERVER(Observer, observers_, OnInitializationCompleted(true));
+    for (Observer& observer : observers_)
+      observer.OnInitializationCompleted(true);
     return;
   }
 
@@ -175,7 +176,8 @@ void SupervisedUserPrefStore::OnNewSettingsAvailable(
 
   // Send out change notifications.
   for (const std::string& pref : changed_prefs) {
-    FOR_EACH_OBSERVER(Observer, observers_, OnPrefValueChanged(pref));
+    for (Observer& observer : observers_)
+      observer.OnPrefValueChanged(pref);
   }
 }