Remove FOR_EACH_OBSERVER macro usage in chrome/browser/extensions

chrome/browser/extensions/blacklist.cc

 // Copyright 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 "chrome/browser/extensions/blacklist.h"
 
 #include <algorithm>
 #include <iterator>
 
 #include "base/bind.h"
@@ skipping 335 matching lines @@
 
 // static
 scoped_refptr<SafeBrowsingDatabaseManager> Blacklist::GetDatabaseManager() {
   return g_database_manager.Get().get();
 }
 
 void Blacklist::Observe(int type,
                         const content::NotificationSource& source,
                         const content::NotificationDetails& details) {
   DCHECK_EQ(chrome::NOTIFICATION_SAFE_BROWSING_UPDATE_COMPLETE, type);
-  FOR_EACH_OBSERVER(Observer, observers_, OnBlacklistUpdated());
+  for (auto& observer : observers_)
+    observer.OnBlacklistUpdated();
 }
 
 }  // namespace extensions