Convert iOS to use X509CertificateBytes.

net/cert/x509_util_ios.h

 // Copyright 2017 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_UTIL_IOS_H_
 #define NET_CERT_X509_UTIL_IOS_H_
 
 #include <Security/Security.h>
 
+#include <vector>
+
 #include "base/mac/scoped_cftyperef.h"
+#include "base/memory/ref_counted.h"
 #include "net/base/net_export.h"
 
 namespace net {
 
 class X509Certificate;
 
 namespace x509_util {
 
+// Creates a SecCertificate handle from the DER-encoded representation.
+// Returns NULL on failure.
+NET_EXPORT base::ScopedCFTypeRef<SecCertificateRef>
+CreateSecCertificateFromBytes(const uint8_t* data, size_t length);
+
 // Returns a SecCertificate representing |cert|, or NULL on failure.
 NET_EXPORT base::ScopedCFTypeRef<SecCertificateRef>
 CreateSecCertificateFromX509Certificate(const X509Certificate* cert);
 
+// Creates an X509Certificate representing |sec_cert| with intermediates
+// |sec_chain|.
+NET_EXPORT scoped_refptr<X509Certificate>
+CreateX509CertificateFromSecCertificate(
+    SecCertificateRef sec_cert,
+    const std::vector<SecCertificateRef>& sec_chain);
+
 }  // namespace x509_util
 
 }  // namespace net
 
 #endif  // NET_CERT_X509_UTIL_IOS_H_