Cast device revocation checking.

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 5fb0ea162c46d496650d187c2b5480d02abc2685..4741d5c2acd231931ff90f2836384241ca37651c 100644
--- a/components/cast_certificate/cast_cert_validator.cc
+++ b/components/cast_certificate/cast_cert_validator.cc
@@ -298,6 +298,15 @@ bool VerifyDeviceCert(const std::vector<std::string>& certs,
   return CheckTargetCertificate(input_chain[0].get(), context, policy);
 }
 
+const std::string FindCastTrustAnchorByName(const std::string& name) {
+  std::vector<scoped_refptr<net::ParsedCertificate>> matches;
+  CastTrustStore::Get().FindTrustAnchorsByNormalizedName(net::der::Input(&name),
+                                                         &matches);
+  if (matches.empty())
+    return "";
+  return matches[0]->der_cert().AsString();
+}
+
 std::unique_ptr<CertVerificationContext> CertVerificationContextImplForTest(
     const base::StringPiece& spki) {
   // Use a bogus CommonName, since this is just exposed for testing signature