Reduce usage of FOR_EACH_OBSERVER macro in components/

components/prefs/default_pref_store.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/prefs/default_pref_store.h"
 
 #include <utility>
 
 #include "base/logging.h"
 
@@ skipping 23 matching lines @@
   DCHECK(!GetValue(key, NULL));
   prefs_.SetValue(key, std::move(value));
 }
 
 void DefaultPrefStore::ReplaceDefaultValue(const std::string& key,
                                            std::unique_ptr<Value> value) {
   const Value* old_value = NULL;
   GetValue(key, &old_value);
   bool notify = !old_value->Equals(value.get());
   prefs_.SetValue(key, std::move(value));
-  if (notify)
-    FOR_EACH_OBSERVER(Observer, observers_, OnPrefValueChanged(key));
+  if (notify) {
+    for (Observer& observer : observers_)
+      observer.OnPrefValueChanged(key);
+  }
 }
 
 DefaultPrefStore::const_iterator DefaultPrefStore::begin() const {
   return prefs_.begin();
 }
 
 DefaultPrefStore::const_iterator DefaultPrefStore::end() const {
   return prefs_.end();
 }
 
 DefaultPrefStore::~DefaultPrefStore() {}