Add production Cast CRL certificate.

components/cast_certificate/cast_cert_validator.h

Index: components/cast_certificate/cast_cert_validator.h
diff --git a/components/cast_certificate/cast_cert_validator.h b/components/cast_certificate/cast_cert_validator.h
index be924be74da3713f8f2ec81db1c05b24d6642f87..f71a8a765478c316e6c2c6d30c95716132929642 100644
--- a/components/cast_certificate/cast_cert_validator.h
+++ b/components/cast_certificate/cast_cert_validator.h
@@ -109,6 +109,11 @@ std::unique_ptr<CertVerificationContext> CertVerificationContextImplForTest(
 // Returns true if successful, false if nothing is changed.
 bool SetTrustAnchorForTest(const std::string& cert) WARN_UNUSED_RESULT;
 
+// Exposed only for testing, not for use in production code.
+//
+// Resets CastTrustStore to the default set of roots.
+void ResetTrustAnchorForTest();
+
 }  // namespace cast_certificate
 
 #endif  // COMPONENTS_CAST_CERTIFICATE_CAST_CERT_VALIDATOR_H_