Reduce usage of FOR_EACH_OBSERVER macro in components/

components/syncable_prefs/pref_model_associator.cc

Index: components/syncable_prefs/pref_model_associator.cc
diff --git a/components/syncable_prefs/pref_model_associator.cc b/components/syncable_prefs/pref_model_associator.cc
index 08392b3484095fb191184f58237ea8cddc5398d2..a704131971d01012a0ed28d4664a52e08ea28964 100644
--- a/components/syncable_prefs/pref_model_associator.cc
+++ b/components/syncable_prefs/pref_model_associator.cc
@@ -538,8 +538,8 @@ void PrefModelAssociator::NotifySyncedPrefObservers(const std::string& path,
   if (observer_iter == synced_pref_observers_.end())
     return;
   SyncedPrefObserverList* observers = observer_iter->second.get();
-  FOR_EACH_OBSERVER(SyncedPrefObserver, *observers,
-                    OnSyncedPrefChanged(path, from_sync));
+  for (auto& observer : *observers)
+    observer.OnSyncedPrefChanged(path, from_sync);
 }
 
 }  // namespace syncable_prefs