Add error information to VerifySignedData().

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 121 matching lines @@
     // SHA-1.
     // TODO(eroman): Is it possible to use other hash algorithms?
     auto signature_algorithm =
         net::SignatureAlgorithm::CreateRsaPkcs1(net::DigestAlgorithm::Sha1);
 
     // Use the same policy as was used for verifying signatures in
     // certificates. This will ensure for instance that the key used is at
     // least 2048-bits long.
     auto signature_policy = CreateCastSignaturePolicy();
 
+    net::CertErrors errors;
     return net::VerifySignedData(
         *signature_algorithm, net::der::Input(data),
         net::der::BitString(net::der::Input(signature), 0),
-        net::der::Input(&spki_), signature_policy.get());
+        net::der::Input(&spki_), signature_policy.get(), &errors);
   }
 
   std::string GetCommonName() const override { return common_name_; }
 
  private:
   std::string spki_;
   std::string common_name_;
 };
 
 // Helper that extracts the Common Name from a certificate's subject field. On
@@ skipping 191 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