Extracting NetLog inner classes into their own classes.

net/cert/x509_certificate_net_log_param.h

 // 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.
 
 #ifndef NET_BASE_X509_CERT_NET_LOG_PARAM_H_
 #define NET_BASE_X509_CERT_NET_LOG_PARAM_H_
 
 #include <memory>
 
-#include "net/log/net_log.h"
+namespace base {
+class Value;
+}
 
 namespace net {
 
+class NetLogCaptureMode;
 class X509Certificate;
 
 // Creates NetLog parameter to describe an X509Certificate.
 std::unique_ptr<base::Value> NetLogX509CertificateCallback(
     const X509Certificate* certificate,
     NetLogCaptureMode capture_mode);
 
 }  // namespace net
 
 #endif  // NET_BASE_X509_CERT_NET_LOG_PARAM_H_