QUIC - Race Cert Verification with host resolution if certs are

net/quic/crypto/proof_verifier_chromium.cc

Index: net/quic/crypto/proof_verifier_chromium.cc
diff --git a/net/quic/crypto/proof_verifier_chromium.cc b/net/quic/crypto/proof_verifier_chromium.cc
index 096374a747255b451000cf3afccf034083a13368..965410db1137dc9f75595e5fcb782b9b78d2aeee 100644
--- a/net/quic/crypto/proof_verifier_chromium.cc
+++ b/net/quic/crypto/proof_verifier_chromium.cc
@@ -228,7 +228,8 @@ QuicAsyncStatus ProofVerifierChromium::Job::VerifyProof(
 
   // We call VerifySignature first to avoid copying of server_config and
   // signature.
-  if (!VerifySignature(server_config, quic_version, chlo_hash, signature,
+  if (!signature.empty() &&
+      !VerifySignature(server_config, quic_version, chlo_hash, signature,
                        certs[0])) {
     *error_details = "Failed to verify signature of server config";
     DLOG(WARNING) << *error_details;