Move Singleton and related structs to namespace base

chrome/browser/google/google_search_counter.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/google/google_search_counter.h"
 
 #include "base/logging.h"
 #include "components/google/core/browser/google_util.h"
 #include "content/public/browser/navigation_controller.h"
 #include "content/public/browser/navigation_details.h"
 #include "content/public/browser/navigation_entry.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/notification_types.h"
 
 // static
 void GoogleSearchCounter::RegisterForNotifications() {
   GoogleSearchCounter::GetInstance()->RegisterForNotificationsInternal();
 }
 
 // static
 GoogleSearchCounter* GoogleSearchCounter::GetInstance() {
-  return Singleton<GoogleSearchCounter>::get();
+  return base::Singleton<GoogleSearchCounter>::get();
 }
 
 GoogleSearchMetrics::AccessPoint
 GoogleSearchCounter::GetGoogleSearchAccessPointForSearchNavEntry(
     const content::NavigationEntry& entry) const {
   DCHECK(google_util::IsGoogleSearchUrl(entry.GetURL()));
 
   // If the |entry| is FROM_ADDRESS_BAR, it comes from the omnibox; if it's
   // GENERATED, the user was doing a search, rather than doing a navigation to a
   // search URL (e.g. from hisotry, or pasted in).
@@ skipping 58 matching lines @@
                                   const content::NotificationSource& source,
                                   const content::NotificationDetails& details) {
   switch (type) {
     case content::NOTIFICATION_NAV_ENTRY_COMMITTED:
       ProcessCommittedEntry(source, details);
       break;
     default:
       NOTREACHED();
   }
 }