Move Singleton and related structs to namespace base

net/ssl/openssl_client_key_store.cc

 // Copyright (c) 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 "net/ssl/openssl_client_key_store.h"
 
 #include <openssl/evp.h>
 #include <openssl/x509.h>
 #include <algorithm>
 
@@ skipping 99 matching lines @@
 
   return crypto::ScopedEVP_PKEY(
       EVP_PKEY_up_ref(pairs_[index].private_key.get()));
 }
 
 void OpenSSLClientKeyStore::Flush() {
   pairs_.clear();
 }
 
 OpenSSLClientKeyStore* OpenSSLClientKeyStore::GetInstance() {
-  return Singleton<OpenSSLClientKeyStore>::get();
+  return base::Singleton<OpenSSLClientKeyStore>::get();
 }
 
 }  // namespace net