Move Singleton and related structs to namespace base

chrome/browser/ui/settings_window_manager.h

 // Copyright (c) 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.
 
 #ifndef CHROME_BROWSER_UI_SETTINGS_WINDOW_MANAGER_H_
 #define CHROME_BROWSER_UI_SETTINGS_WINDOW_MANAGER_H_
 
 #include <map>
 #include <string>
 
@@ skipping 24 matching lines @@
   void ShowChromePageForProfile(Profile* profile, const GURL& gurl);
 
   // If a Browser settings window for |profile| has already been created,
   // returns it, otherwise returns NULL.
   Browser* FindBrowserForProfile(Profile* profile);
 
   // Returns true if |browser| is a settings window.
   bool IsSettingsBrowser(Browser* browser) const;
 
  private:
-  friend struct DefaultSingletonTraits<SettingsWindowManager>;
+  friend struct base::DefaultSingletonTraits<SettingsWindowManager>;
   typedef std::map<Profile*, SessionID::id_type> ProfileSessionMap;
 
   SettingsWindowManager();
   ~SettingsWindowManager();
 
   base::ObserverList<SettingsWindowManagerObserver> observers_;
   ProfileSessionMap settings_session_map_;
 
   DISALLOW_COPY_AND_ASSIGN(SettingsWindowManager);
 };
 
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_UI_SETTINGS_WINDOW_MANAGER_H_