Clean up header files.

net/cert/x509_util_openssl.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 "net/cert/x509_util_openssl.h"
 
+#include <limits.h>
 #include <openssl/asn1.h>
 #include <openssl/mem.h>
 
 #include <algorithm>
 
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/strings/string_piece.h"
 #include "base/strings/string_util.h"
@@ skipping 282 matching lines @@
     internal_cache = new_cache.get();
     X509_set_ex_data(x509, x509_der_cache_index, new_cache.release());
   }
   *der_cache = base::StringPiece(internal_cache->data);
   return true;
 }
 
 }  // namespace x509_util
 
 }  // namespace net