Add error information to VerifySignedData().

components/cast_certificate/cast_cert_validator.cc

Index: components/cast_certificate/cast_cert_validator.cc
diff --git a/components/cast_certificate/cast_cert_validator.cc b/components/cast_certificate/cast_cert_validator.cc
index 915cab7d8f2c19cbc39191f021b2e37d43072054..a36b7a315f63934736748afa30c930422b41f8ec 100644
--- a/components/cast_certificate/cast_cert_validator.cc
+++ b/components/cast_certificate/cast_cert_validator.cc
@@ -139,10 +139,11 @@ class CertVerificationContextImpl : public CertVerificationContext {
     // 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_; }