Reduce usage of FOR_EACH_OBSERVER macro in components/

components/syncable_prefs/pref_service_syncable.cc

 // Copyright (c) 2012 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 "components/syncable_prefs/pref_service_syncable.h"
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/files/file_path.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 162 matching lines @@
     uint32_t flags) {
   DCHECK(FindPreference(path));
   if (flags & user_prefs::PrefRegistrySyncable::SYNCABLE_PREF) {
     pref_sync_associator_.RegisterPref(path.c_str());
   } else if (flags & user_prefs::PrefRegistrySyncable::SYNCABLE_PRIORITY_PREF) {
     priority_pref_sync_associator_.RegisterPref(path.c_str());
   }
 }
 
 void PrefServiceSyncable::OnIsSyncingChanged() {
-  FOR_EACH_OBSERVER(PrefServiceSyncableObserver, observer_list_,
-                    OnIsSyncingChanged());
+  for (auto& observer : observer_list_)
+    observer.OnIsSyncingChanged();
 }
 
 void PrefServiceSyncable::ProcessPrefChange(const std::string& name) {
   pref_sync_associator_.ProcessPrefChange(name);
   priority_pref_sync_associator_.ProcessPrefChange(name);
 }
 
 }  // namespace syncable_prefs