Move Singleton and related structs to namespace base

extensions/browser/api/web_request/web_request_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 "extensions/browser/api/web_request/web_request_api.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 694 matching lines @@
 
 ExtensionWebRequestEventRouter::RequestFilter::~RequestFilter() {
 }
 
 //
 // ExtensionWebRequestEventRouter
 //
 
 // static
 ExtensionWebRequestEventRouter* ExtensionWebRequestEventRouter::GetInstance() {
-  return Singleton<ExtensionWebRequestEventRouter>::get();
+  return base::Singleton<ExtensionWebRequestEventRouter>::get();
 }
 
 ExtensionWebRequestEventRouter::ExtensionWebRequestEventRouter()
     : request_time_tracker_(new ExtensionWebRequestTimeTracker) {
   web_request_event_router_delegate_.reset(
       ExtensionsAPIClient::Get()->CreateWebRequestEventRouterDelegate());
 }
 
 ExtensionWebRequestEventRouter::~ExtensionWebRequestEventRouter() {
 }
@@ skipping 1756 matching lines @@
   // Continue gracefully.
   RunSync();
 }
 
 bool WebRequestHandlerBehaviorChangedFunction::RunSync() {
   helpers::ClearCacheOnNavigation();
   return true;
 }
 
 }  // namespace extensions