net: extract net/cert out of net/base

net/cert/pem_tokenizer.h

 // Copyright (c) 2011 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.
 
-#ifndef NET_BASE_PEM_TOKENIZER_H_
-#define NET_BASE_PEM_TOKENIZER_H_
+#ifndef NET_CERT_PEM_TOKENIZER_H_
+#define NET_CERT_PEM_TOKENIZER_H_
 
 #include <string>
 #include <vector>
 
 #include "base/string_piece.h"
 #include "net/base/net_export.h"
 
 namespace net {
 
 // PEMTokenizer is a utility class for the parsing of data encapsulated
@@ skipping 50 matching lines @@
   std::vector<PEMType> block_types_;
 
   // The raw (Base64-decoded) data of the last successfully decoded block.
   std::string data_;
 
   DISALLOW_COPY_AND_ASSIGN(PEMTokenizer);
 };
 
 }  // namespace net
 
-#endif  // NET_BASE_PEM_TOKENIZER_H_
+#endif  // NET_CERT_PEM_TOKENIZER_H_