Replace FOR_EACH_OBSERVER in chromeos/ with range-based for

chromeos/cert_loader.cc

 // Copyright (c) 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 "chromeos/cert_loader.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 152 matching lines @@
   bool initial_load = !certificates_loaded_;
   certificates_loaded_ = true;
   NotifyCertificatesLoaded(initial_load);
 
   certificates_update_running_ = false;
   if (certificates_update_required_)
     LoadCertificates();
 }
 
 void CertLoader::NotifyCertificatesLoaded(bool initial_load) {
-  FOR_EACH_OBSERVER(Observer, observers_,
-                    OnCertificatesLoaded(*cert_list_, initial_load));
+  for (auto& observer : observers_)
+    observer.OnCertificatesLoaded(*cert_list_, initial_load);
 }
 
 void CertLoader::OnCertDBChanged(const net::X509Certificate* cert) {
   VLOG(1) << "OnCertDBChanged";
   LoadCertificates();
 }
 
 }  // namespace chromeos