Move Singleton and related structs to namespace base

chrome/browser/extensions/api/braille_display_private/braille_controller_stub.cc

 // Copyright 2013 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/braille_display_private/braille_controller.h"
 
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/singleton.h"
 #include "chrome/common/extensions/api/braille_display_private.h"
 
 namespace extensions {
 namespace api {
 namespace braille_display_private {
 
 // Stub implementation of BrailleController for use when brlapi is not
 // enabled.
 class BrailleControllerImpl : public BrailleController {
  public:
   static BrailleControllerImpl* GetInstance();
   scoped_ptr<DisplayState> GetDisplayState() override;
   void WriteDots(const std::vector<char>& cells) override;
   void AddObserver(BrailleObserver* observer) override;
   void RemoveObserver(BrailleObserver* observer) override;
 
  private:
   BrailleControllerImpl();
   ~BrailleControllerImpl() override;
-  friend struct DefaultSingletonTraits<BrailleControllerImpl>;
+  friend struct base::DefaultSingletonTraits<BrailleControllerImpl>;
   DISALLOW_COPY_AND_ASSIGN(BrailleControllerImpl);
 };
 
 BrailleController::BrailleController() {
 }
 
 BrailleController::~BrailleController() {
 }
 
 // static
 BrailleController* BrailleController::GetInstance() {
   return BrailleControllerImpl::GetInstance();
 }
 
 BrailleControllerImpl::BrailleControllerImpl() {
 }
 
 BrailleControllerImpl::~BrailleControllerImpl() {
 }
 
 // static
 BrailleControllerImpl* BrailleControllerImpl::GetInstance() {
-  return Singleton<BrailleControllerImpl,
-                   LeakySingletonTraits<BrailleControllerImpl> >::get();
+  return base::Singleton<
+      BrailleControllerImpl,
+      base::LeakySingletonTraits<BrailleControllerImpl>>::get();
 }
 
 scoped_ptr<DisplayState> BrailleControllerImpl::GetDisplayState() {
   return scoped_ptr<DisplayState>(new DisplayState()).Pass();
 }
 
 void BrailleControllerImpl::WriteDots(const std::vector<char>& cells) {
 }
 
 void BrailleControllerImpl::AddObserver(BrailleObserver* observer) {
 }
 
 void BrailleControllerImpl::RemoveObserver(BrailleObserver* observer) {
 }
 
 }  // namespace braille_display_private
 }  // namespace api
 }  // namespace extensions