Add a key purpose parameter to Certificate PathBuilder.

net/cert/cert_verify_proc_builtin.cc

 // Copyright (c) 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.
 
 #include "net/cert/cert_verify_proc_builtin.h"
 
 #include <string>
 #include <vector>
 
 #if defined(USE_NSS_CERTS)
@@ skipping 341 matching lines @@
                                         &verification_time)) {
     // This really shouldn't be possible unless Time::Now() returned
     // something crazy.
     verify_result->cert_status |= CERT_STATUS_DATE_INVALID;
     return;
   }
 
   // Initialize the path builder.
   CertPathBuilder::Result result;
   CertPathBuilder path_builder(target, trust_store->GetTrustStore(),
-                               &signature_policy, verification_time, &result);
+                               &signature_policy, verification_time,
+                               KeyPurpose::SERVER_AUTH, &result);
 
   // Allow the path builder to discover intermediates from the trust store.
   if (trust_store->GetCertIssuerSource())
     path_builder.AddCertIssuerSource(trust_store->GetCertIssuerSource());
 
   // Allow the path builder to discover the explicitly provided intermediates in
   // |input_cert|.
   CertIssuerSourceStatic intermediates;
   AddIntermediatesToIssuerSource(input_cert, &intermediates);
   path_builder.AddCertIssuerSource(&intermediates);
@@ skipping 62 matching lines @@
              : OK;
 }
 
 }  // namespace
 
 scoped_refptr<CertVerifyProc> CreateCertVerifyProcBuiltin() {
   return scoped_refptr<CertVerifyProc>(new CertVerifyProcBuiltin());
 }
 
 }  // namespace net