Remove FOR_EACH_OBSERVER macro usage in chrome/browser/extensions

chrome/browser/extensions/api/mdns/dns_sd_registry.cc

 // Copyright 2013 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.
 
 #include "chrome/browser/extensions/api/mdns/dns_sd_registry.h"
 
 #include <utility>
 
 #include "base/stl_util.h"
 #include "chrome/browser/extensions/api/mdns/dns_sd_device_lister.h"
@@ skipping 212 matching lines @@
 
   bool is_cleared = service_data_map_[service_type]->ClearServices();
   VLOG(1) << "ServicesFlushed: is_cleared: " << is_cleared;
 
   if (is_cleared)
     DispatchApiEvent(service_type);
 }
 
 void DnsSdRegistry::DispatchApiEvent(const std::string& service_type) {
   VLOG(1) << "DispatchApiEvent: service_type: " << service_type;
-  FOR_EACH_OBSERVER(DnsSdObserver, observers_, OnDnsSdEvent(
-      service_type, service_data_map_[service_type]->GetServiceList()));
+  for (auto& observer : observers_) {
+    observer.OnDnsSdEvent(service_type,
+                          service_data_map_[service_type]->GetServiceList());
+  }
 }
 
 bool DnsSdRegistry::IsRegistered(const std::string& service_type) {
   return service_data_map_.find(service_type) != service_data_map_.end();
 }
 
 }  // namespace extensions