Implement an openssl version of a QUIC ProofSource.

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"
-
-using std::string;
-using std::vector;
-
-namespace net {
-
-ProofSourceChromium::ProofSourceChromium() {
-}
-
-bool ProofSourceChromium::GetProof(const IPAddressNumber& server_ip,
-                                   const string& hostname,
-                                   const string& server_config,
-                                   bool ecdsa_ok,
-                                   const vector<string>** out_certs,
-                                   string* out_signature) {
-  return false;
-}
-
-}  // namespace net