Move Singleton and related structs to namespace base

chrome/browser/extensions/api/input_ime/input_ime_api.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/extensions/api/input_ime/input_ime_api.h"
 
 #include "base/strings/string_number_conversions.h"
 #include "base/values.h"
 #include "chrome/browser/chromeos/input_method/input_method_engine.h"
 #include "chrome/browser/chromeos/login/lock/screen_locker.h"
@@ skipping 401 matching lines @@
   Profile* profile_;
 
   DISALLOW_COPY_AND_ASSIGN(ImeObserver);
 };
 
 }  // namespace chromeos
 
 namespace extensions {
 
 InputImeEventRouterFactory* InputImeEventRouterFactory::GetInstance() {
-  return Singleton<InputImeEventRouterFactory>::get();
+  return base::Singleton<InputImeEventRouterFactory>::get();
 }
 
 InputImeEventRouterFactory::InputImeEventRouterFactory() {
 }
 
 InputImeEventRouterFactory::~InputImeEventRouterFactory() {
 }
 
 InputImeEventRouter* InputImeEventRouterFactory::GetRouter(Profile* profile) {
   InputImeEventRouter* router = router_map_[profile];
@@ skipping 520 matching lines @@
   InputMethodEngineInterface* engine =
       GetInputImeEventRouter(
           Profile::FromBrowserContext(details.browser_context))
           ->GetActiveEngine(details.extension_id);
   // Notifies the IME extension for IME ready with onActivate/onFocus events.
   if (engine)
     engine->Enable(engine->GetActiveComponentId());
 }
 
 }  // namespace extensions