Replace FOR_EACH_OBSERVER in c/b/chromeos with range-based for

chrome/browser/chromeos/policy/device_local_account_policy_service.cc

Index: chrome/browser/chromeos/policy/device_local_account_policy_service.cc
diff --git a/chrome/browser/chromeos/policy/device_local_account_policy_service.cc b/chrome/browser/chromeos/policy/device_local_account_policy_service.cc
index 711ecb1721de559b21bd21465b0f11d1130a1366..d4ba66d91b2f27f4cce9817c7b8c06f1815fd68f 100644
--- a/chrome/browser/chromeos/policy/device_local_account_policy_service.cc
+++ b/chrome/browser/chromeos/policy/device_local_account_policy_service.cc
@@ -529,7 +529,8 @@ void DeviceLocalAccountPolicyService::UpdateAccountList() {
                                               component_policy_cache_root_,
                                               subdirectories_to_keep));
 
-  FOR_EACH_OBSERVER(Observer, observers_, OnDeviceLocalAccountsChanged());
+  for (auto& observer : observers_)
+    observer.OnDeviceLocalAccountsChanged();
 }
 
 void DeviceLocalAccountPolicyService::DeleteBrokers(PolicyBrokerMap* map) {
@@ -563,7 +564,8 @@ DeviceLocalAccountPolicyBroker*
 
 void DeviceLocalAccountPolicyService::NotifyPolicyUpdated(
     const std::string& user_id) {
-  FOR_EACH_OBSERVER(Observer, observers_, OnPolicyUpdated(user_id));
+  for (auto& observer : observers_)
+    observer.OnPolicyUpdated(user_id);
 }
 
 }  // namespace policy