Move Singleton and related structs to namespace base

chrome/browser/ui/aura/accessibility/automation_manager_aura.cc

 // Copyright 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.
 
 #include "chrome/browser/ui/aura/accessibility/automation_manager_aura.h"
 
 #include <vector>
 
 #include "base/memory/singleton.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/extensions/api/automation_internal/automation_event_router.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/common/extensions/chrome_extension_messages.h"
 #include "content/public/browser/ax_event_notification_details.h"
 #include "content/public/browser/browser_context.h"
 #include "ui/aura/window.h"
 #include "ui/views/accessibility/ax_aura_obj_cache.h"
 #include "ui/views/accessibility/ax_aura_obj_wrapper.h"
 #include "ui/views/view.h"
 #include "ui/views/widget/widget.h"
 
 using content::BrowserContext;
 using extensions::AutomationEventRouter;
 
 // static
 AutomationManagerAura* AutomationManagerAura::GetInstance() {
-  return Singleton<AutomationManagerAura>::get();
+  return base::Singleton<AutomationManagerAura>::get();
 }
 
 void AutomationManagerAura::Enable(BrowserContext* context) {
   enabled_ = true;
   if (!current_tree_.get())
     current_tree_.reset(new AXTreeSourceAura());
   ResetSerializer();
 
   SendEvent(context, current_tree_->GetRoot(), ui::AX_EVENT_LOAD_COMPLETE);
   if (focused_window_) {
@@ skipping 103 matching lines @@
   for (size_t i = 0; i < pending_events_copy.size(); ++i) {
     SendEvent(context,
               pending_events_copy[i].first,
               pending_events_copy[i].second);
   }
 }
 
 void AutomationManagerAura::OnNativeFocusChanged(aura::Window* focused_now) {
   focused_window_ = focused_now;
 }