Remove dependence on a message loop for net::PathBuilder.

components/cast_certificate/cast_cert_validator.cc

 // Copyright 2014 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 "components/cast_certificate/cast_cert_validator.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 292 matching lines @@
   // Do path building and RFC 5280 compatible certificate verification using the
   // two Cast trust anchors and Cast signature policy.
   net::der::GeneralizedTime verification_time;
   if (!net::der::EncodeTimeAsGeneralizedTime(time, &verification_time))
     return false;
   net::CertPathBuilder::Result result;
   net::CertPathBuilder path_builder(target_cert.get(), trust_store,
                                     signature_policy.get(), verification_time,
                                     &result);
   path_builder.AddCertIssuerSource(&intermediate_cert_issuer_source);
-  net::CompletionStatus rv = path_builder.Run(base::Closure());
-  DCHECK_EQ(rv, net::CompletionStatus::SYNC);
+  path_builder.Run();
   if (!result.HasValidPath()) {
     // TODO(crbug.com/634443): Log error information.
     return false;
   }
 
   // Check properties of the leaf certificate (key usage, policy), and construct
   // a CertVerificationContext that uses its public key.
   if (!CheckTargetCertificate(target_cert.get(), context, policy))
     return false;
 
@@ skipping 12 matching lines @@
 
 std::unique_ptr<CertVerificationContext> CertVerificationContextImplForTest(
     const base::StringPiece& spki) {
   // Use a bogus CommonName, since this is just exposed for testing signature
   // verification by unittests.
   return base::MakeUnique<CertVerificationContextImpl>(net::der::Input(spki),
                                                        "CommonName");
 }
 
 }  // namespace cast_certificate