Move Singleton and related structs to namespace base

chrome/browser/plugins/plugin_prefs_factory.cc

 // Copyright (c) 2012 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/plugins/plugin_prefs_factory.h"
 
 #include "base/path_service.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/plugins/plugin_prefs.h"
 #include "chrome/browser/profiles/incognito_helpers.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/pref_names.h"
 #include "components/keyed_service/content/browser_context_dependency_manager.h"
 #include "components/keyed_service/core/keyed_service.h"
 #include "components/pref_registry/pref_registry_syncable.h"
 
 // static
 PluginPrefsFactory* PluginPrefsFactory::GetInstance() {
-  return Singleton<PluginPrefsFactory>::get();
+  return base::Singleton<PluginPrefsFactory>::get();
 }
 
 // static
 scoped_refptr<PluginPrefs> PluginPrefsFactory::GetPrefsForProfile(
     Profile* profile) {
   return static_cast<PluginPrefs*>(
       GetInstance()->GetServiceForBrowserContext(profile, true).get());
 }
 
 // static
@@ skipping 38 matching lines @@
   return chrome::GetBrowserContextRedirectedInIncognito(context);
 }
 
 bool PluginPrefsFactory::ServiceIsNULLWhileTesting() const {
   return true;
 }
 
 bool PluginPrefsFactory::ServiceIsCreatedWithBrowserContext() const {
   return true;
 }