Move Singleton and related structs to namespace base

chrome/browser/recovery/recovery_install_global_error_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/recovery/recovery_install_global_error_factory.h"
 
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/recovery/recovery_install_global_error.h"
 #include "chrome/browser/ui/global_error/global_error_service_factory.h"
@@ skipping 11 matching lines @@
 // static
 RecoveryInstallGlobalError*
 RecoveryInstallGlobalErrorFactory::GetForProfile(Profile* profile) {
   return static_cast<RecoveryInstallGlobalError*>(
       GetInstance()->GetServiceForBrowserContext(profile, true));
 }
 
 // static
 RecoveryInstallGlobalErrorFactory*
 RecoveryInstallGlobalErrorFactory::GetInstance() {
-  return Singleton<RecoveryInstallGlobalErrorFactory>::get();
+  return base::Singleton<RecoveryInstallGlobalErrorFactory>::get();
 }
 
 KeyedService* RecoveryInstallGlobalErrorFactory::BuildServiceInstanceFor(
     content::BrowserContext* context) const {
 #if defined(OS_WIN) || defined(OS_MACOSX)
   return new RecoveryInstallGlobalError(static_cast<Profile*>(context));
 #else
   return NULL;
 #endif
 }