Move Singleton and related structs to namespace base

chrome/browser/chromeos/policy/policy_cert_service_factory.cc

 // Copyright 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 "chrome/browser/chromeos/policy/policy_cert_service_factory.h"
 
 #include "base/memory/singleton.h"
 #include "base/prefs/pref_registry_simple.h"
 #include "base/prefs/pref_service.h"
 #include "base/prefs/scoped_user_pref_update.h"
@@ skipping 24 matching lines @@
   DCHECK(!GetInstance()->GetServiceForBrowserContext(profile, false));
   PolicyCertService* service = static_cast<PolicyCertService*>(
       GetInstance()->GetServiceForBrowserContext(profile, true));
   if (!service)
     return scoped_ptr<PolicyCertVerifier>();
   return service->CreatePolicyCertVerifier();
 }
 
 // static
 PolicyCertServiceFactory* PolicyCertServiceFactory::GetInstance() {
-  return Singleton<PolicyCertServiceFactory>::get();
+  return base::Singleton<PolicyCertServiceFactory>::get();
 }
 
 // static
 void PolicyCertServiceFactory::SetUsedPolicyCertificates(
     const std::string& user_id) {
   if (UsedPolicyCertificates(user_id))
     return;
   ListPrefUpdate update(g_browser_process->local_state(),
                         prefs::kUsedPolicyCertificates);
   update->AppendString(user_id);
@@ skipping 85 matching lines @@
   // TODO(joaodasilva): this is used for backwards compatibility.
   // Remove once it's not necessary anymore.
   registry->RegisterBooleanPref(prefs::kUsedPolicyCertificatesOnce, false);
 }
 
 bool PolicyCertServiceFactory::ServiceIsNULLWhileTesting() const {
   return true;
 }
 
 }  // namespace policy