Move Singleton and related structs to namespace base

chrome/browser/domain_reliability/service_factory.cc

 // Copyright 2014 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/domain_reliability/service_factory.h"
 
 #include "base/command_line.h"
 #include "base/metrics/field_trial.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/browser_process.h"
@@ skipping 58 matching lines @@
 DomainReliabilityServiceFactory::GetForBrowserContext(
     content::BrowserContext* context) {
   return static_cast<DomainReliabilityService*>(
       GetInstance()->GetServiceForBrowserContext(context,
                                                  /* create = */ true));
 }
 
 // static
 DomainReliabilityServiceFactory*
 DomainReliabilityServiceFactory::GetInstance() {
-  return Singleton<DomainReliabilityServiceFactory>::get();
+  return base::Singleton<DomainReliabilityServiceFactory>::get();
 }
 
 DomainReliabilityServiceFactory::DomainReliabilityServiceFactory()
     : BrowserContextKeyedServiceFactory(
           "DomainReliabilityService",
           BrowserContextDependencyManager::GetInstance()) {}
 
 DomainReliabilityServiceFactory::~DomainReliabilityServiceFactory() {}
 
 KeyedService* DomainReliabilityServiceFactory::BuildServiceInstanceFor(
     content::BrowserContext* context) const {
   if (!IsDomainReliabilityMonitoringEnabled())
     return NULL;
 
   if (!IsMetricsReportingEnabled())
     return NULL;
 
   return DomainReliabilityService::Create(kUploadReporterString);
 }
 
 }  // namespace domain_reliability