Move Singleton and related structs to namespace base

chrome/browser/plugins/chrome_plugin_service_filter.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/chrome_plugin_service_filter.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/logging.h"
@@ skipping 162 matching lines @@
           (disposition == CURRENT_TAB) ? NEW_FOREGROUND_TAB : disposition,
           ui::PAGE_TRANSITION_LINK, false));
   content::RecordAction(UserMetricsAction("NPAPIRemovalInfobar.LearnMore"));
   return true;
 }
 
 }  // namespace
 
 // static
 ChromePluginServiceFilter* ChromePluginServiceFilter::GetInstance() {
-  return Singleton<ChromePluginServiceFilter>::get();
+  return base::Singleton<ChromePluginServiceFilter>::get();
 }
 
 void ChromePluginServiceFilter::RegisterResourceContext(
     PluginPrefs* plugin_prefs,
     const void* context) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   base::AutoLock lock(lock_);
   resource_context_map_[context] = plugin_prefs;
 }
 
@@ skipping 256 matching lines @@
 
 ChromePluginServiceFilter::OverriddenPlugin::~OverriddenPlugin() {
 }
 
 ChromePluginServiceFilter::ProcessDetails::ProcessDetails() {
 }
 
 ChromePluginServiceFilter::ProcessDetails::~ProcessDetails() {
 }