Add error information to VerifyCertificateChain().

net/tools/cert_verify_tool/verify_using_path_builder.cc

 // Copyright 2016 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/tools/cert_verify_tool/verify_using_path_builder.h"
 
 #include <iostream>
 
 #include "base/memory/ptr_util.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 179 matching lines @@
 
   net::TestClosure callback;
   net::CompletionStatus rv = path_builder.Run(callback.closure());
 
   if (rv == net::CompletionStatus::ASYNC) {
     DVLOG(1) << "waiting for async completion...";
     callback.WaitForResult();
     DVLOG(1) << "async completed.";
   }
 
+  // TODO(crbug.com/634443): Display the full error information.
   std::cout << "CertPathBuilder best result: "
             << net::ErrorToShortString(result.error()) << "\n";
 
   for (size_t i = 0; i < result.paths.size(); ++i) {
     std::cout << "path " << i << " "
               << net::ErrorToShortString(result.paths[i]->error)
               << ((result.best_result_index == i) ? " (best)" : "") << "\n";
     for (const auto& cert : result.paths[i]->path.certs) {
       std::cout << " " << FingerPrintParsedCertificate(cert.get()) << " "
                 << SubjectFromParsedCertificate(cert.get()) << "\n";
@@ skipping 16 matching lines @@
     if (!DumpParsedCertificateChain(
             dump_prefix_path.AddExtension(
                 FILE_PATH_LITERAL(".CertPathBuilder.pem")),
             result.paths[result.best_result_index]->path)) {
       return false;
     }
   }
 
   return result.error() == net::OK;
 }