Move Singleton and related structs to namespace base

content/browser/signed_certificate_timestamp_store_impl.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 "content/browser/signed_certificate_timestamp_store_impl.h"
 
 #include "base/memory/singleton.h"
 
 namespace content {
 
 // static
 SignedCertificateTimestampStore*
 SignedCertificateTimestampStore::GetInstance() {
   return SignedCertificateTimestampStoreImpl::GetInstance();
 }
 
 // static
 SignedCertificateTimestampStoreImpl*
 SignedCertificateTimestampStoreImpl::GetInstance() {
-  return Singleton<SignedCertificateTimestampStoreImpl>::get();
+  return base::Singleton<SignedCertificateTimestampStoreImpl>::get();
 }
 
 SignedCertificateTimestampStoreImpl::SignedCertificateTimestampStoreImpl() {}
 
 SignedCertificateTimestampStoreImpl::~SignedCertificateTimestampStoreImpl() {}
 
 int SignedCertificateTimestampStoreImpl::Store(
     net::ct::SignedCertificateTimestamp* sct,
     int process_id) {
   return store_.Store(sct, process_id);
 }
 
 bool SignedCertificateTimestampStoreImpl::Retrieve(
     int sct_id,
     scoped_refptr<net::ct::SignedCertificateTimestamp>* sct) {
   return store_.Retrieve(sct_id, sct);
 }
 
 }  // namespace content