Add plumbing for passing stats from calls to ProofSource::GetProof through QUIC. These stats are n…

net/quic/crypto/proof_source_chromium.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/quic/crypto/proof_source_chromium.h"
 
 #include <openssl/digest.h>
 #include <openssl/evp.h>
 #include <openssl/rsa.h>
 
@@ skipping 148 matching lines @@
                                    bool ecdsa_ok,
                                    std::unique_ptr<Callback> callback) {
   // As a transitional implementation, just call the synchronous version of
   // GetProof, then invoke the callback with the results and destroy it.
   scoped_refptr<ProofSource::Chain> chain;
   string signature;
   string leaf_cert_sct;
   const bool ok =
       GetProof(server_ip, hostname, server_config, quic_version, chlo_hash,
                ecdsa_ok, &chain, &signature, &leaf_cert_sct);
-  callback->Run(ok, chain, signature, leaf_cert_sct);
+  callback->Run(ok, chain, signature, leaf_cert_sct, nullptr /* details */);
 }
 
 }  // namespace net