Change the interface for parsing SignatureAlgorithm to take a

net/cert/internal/signature_algorithm.cc

Index: net/cert/internal/signature_algorithm.cc
diff --git a/net/cert/internal/signature_algorithm.cc b/net/cert/internal/signature_algorithm.cc
index e9bc3c536fa3694eb3c1ed688724e2be2415198c..0a1b0e610edd09456d74cb6fd793cf00cfcb5011 100644
--- a/net/cert/internal/signature_algorithm.cc
+++ b/net/cert/internal/signature_algorithm.cc
@@ -537,8 +537,11 @@ RsaPssParameters::RsaPssParameters(DigestAlgorithm mgf1_hash,
 SignatureAlgorithm::~SignatureAlgorithm() {
 }
 
-std::unique_ptr<SignatureAlgorithm> SignatureAlgorithm::CreateFromDer(
-    const der::Input& algorithm_identifier) {
+std::unique_ptr<SignatureAlgorithm> SignatureAlgorithm::Create(
+    const der::Input& algorithm_identifier,
+    CertErrors* errors) {
+  // TODO(crbug.com/634443): Add useful error information.
+
   der::Input oid;
   der::Input params;
   if (!ParseAlgorithmIdentifier(algorithm_identifier, &oid, &params))
@@ -577,6 +580,9 @@ std::unique_ptr<SignatureAlgorithm> SignatureAlgorithm::CreateFromDer(
   if (oid == der::Input(kOidSha1WithRsaSignature))
     return ParseRsaPkcs1(DigestAlgorithm::Sha1, params);
 
+  // TODO(crbug.com/634443): Add an error indicating what the OID
+  // was.
+
   return nullptr;  // Unsupported OID.
 }