Move Singleton and related structs to namespace base

chrome/browser/extensions/api/input_ime/input_ime_api.h

 // 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_API_INPUT_IME_INPUT_IME_API_H_
 #define CHROME_BROWSER_EXTENSIONS_API_INPUT_IME_INPUT_IME_API_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 59 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(InputImeEventRouter);
 };
 
 class InputImeEventRouterFactory {
  public:
   static InputImeEventRouterFactory* GetInstance();
   InputImeEventRouter* GetRouter(Profile* profile);
 
  private:
-  friend struct DefaultSingletonTraits<InputImeEventRouterFactory>;
+  friend struct base::DefaultSingletonTraits<InputImeEventRouterFactory>;
   InputImeEventRouterFactory();
   ~InputImeEventRouterFactory();
 
   std::map<Profile*, InputImeEventRouter*, ProfileCompare> router_map_;
 
   DISALLOW_COPY_AND_ASSIGN(InputImeEventRouterFactory);
 };
 
 class InputImeSetCompositionFunction : public SyncExtensionFunction {
  public:
@@ skipping 169 matching lines @@
   content::BrowserContext* const browser_context_;
 
   // Listen to extension load, unloaded notifications.
   ScopedObserver<ExtensionRegistry, ExtensionRegistryObserver>
       extension_registry_observer_;
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_INPUT_IME_INPUT_IME_API_H_