net: Cleanup class/struct forward declarations

net/cert/x509_cert_types.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_CERT_X509_CERT_TYPES_H_
 #define NET_CERT_X509_CERT_TYPES_H_
 
 #include <stddef.h>
 #include <string.h>
 
@@ skipping 12 matching lines @@
 #if defined(OS_MACOSX) && !defined(OS_IOS)
 #include <Security/x509defs.h>
 #endif
 
 namespace base {
 class Time;
 }  // namespace base
 
 namespace net {
 
-class X509Certificate;
-
 // CertPrincipal represents the issuer or subject field of an X.509 certificate.
 struct NET_EXPORT CertPrincipal {
   CertPrincipal();
   explicit CertPrincipal(const std::string& name);
   ~CertPrincipal();
 
 #if (defined(OS_MACOSX) && !defined(OS_IOS)) || defined(OS_WIN)
   // Parses a BER-format DistinguishedName.
   bool ParseDistinguishedName(const void* ber_name_data, size_t length);
 #endif
@@ skipping 45 matching lines @@
 // Attempts to parse |raw_date|, an ASN.1 date/time string encoded as
 // |format|, and writes the result into |*time|. If an invalid date is
 // specified, or if parsing fails, returns false, and |*time| will not be
 // updated.
 NET_EXPORT_PRIVATE bool ParseCertificateDate(const base::StringPiece& raw_date,
                                              CertDateFormat format,
                                              base::Time* time);
 }  // namespace net
 
 #endif  // NET_CERT_X509_CERT_TYPES_H_