Move Singleton and related structs to namespace base

chrome/browser/task_manager/task_manager.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/task_manager/task_manager.h"
 
 #include "base/bind.h"
 #include "base/i18n/number_formatting.h"
 #include "base/i18n/rtl.h"
 #include "base/location.h"
@@ skipping 1529 matching lines @@
 void TaskManager::OnWindowClosed() {
   model_->StopUpdating();
 }
 
 void TaskManager::ModelChanged() {
   model_->ModelChanged();
 }
 
 // static
 TaskManager* TaskManager::GetInstance() {
-  return Singleton<TaskManager>::get();
+  return base::Singleton<TaskManager>::get();
 }
 
 void TaskManager::OpenAboutMemory(chrome::HostDesktopType desktop_type) {
   Profile* profile = ProfileManager::GetLastUsedProfileAllowedByPolicy();
   if (profile->IsGuestSession() && !g_browser_process->local_state()->
       GetBoolean(prefs::kBrowserGuestModeEnabled)) {
     UserManager::Show(base::FilePath(),
                       profiles::USER_MANAGER_NO_TUTORIAL,
                       profiles::USER_MANAGER_SELECT_PROFILE_CHROME_MEMORY);
     return;
   }
 
   chrome::NavigateParams params(
       profile, GURL(chrome::kChromeUIMemoryURL), ui::PAGE_TRANSITION_LINK);
   params.disposition = NEW_FOREGROUND_TAB;
   params.host_desktop_type = desktop_type;
   chrome::Navigate(&params);
 }
 
 TaskManager::TaskManager()
     : model_(new TaskManagerModel(this)) {
 }
 
 TaskManager::~TaskManager() {
 }