Move Singleton and related structs to namespace base

chrome/browser/chromeos/certificate_provider/certificate_provider_service_factory.cc

 // Copyright 2015 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/certificate_provider/certificate_provider_service_factory.h"
 
 #include <string>
 #include <vector>
 
 #include "base/logging.h"
@@ skipping 151 matching lines @@
 CertificateProviderService*
 CertificateProviderServiceFactory::GetForBrowserContext(
     content::BrowserContext* context) {
   return static_cast<CertificateProviderService*>(
       GetInstance()->GetServiceForBrowserContext(context, true));
 }
 
 // static
 CertificateProviderServiceFactory*
 CertificateProviderServiceFactory::GetInstance() {
-  return Singleton<CertificateProviderServiceFactory>::get();
+  return base::Singleton<CertificateProviderServiceFactory>::get();
 }
 
 CertificateProviderServiceFactory::CertificateProviderServiceFactory()
     : BrowserContextKeyedServiceFactory(
           "CertificateProviderService",
           BrowserContextDependencyManager::GetInstance()) {
   DependsOn(extensions::EventRouterFactory::GetInstance());
   DependsOn(extensions::ExtensionRegistryFactory::GetInstance());
 }
 
@@ skipping 15 matching lines @@
   }
   CertificateProviderService* const service = new CertificateProviderService();
   service->SetDelegate(make_scoped_ptr(new DefaultDelegate(
       service,
       extensions::ExtensionRegistryFactory::GetForBrowserContext(context),
       extensions::EventRouterFactory::GetForBrowserContext(context))));
   return service;
 }
 
 }  // namespace chromeos