Make CertificateProviderService vend ClientCertIdentities directly.

net/ssl/client_key_store.cc

-// Copyright 2015 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/ssl/client_key_store.h"
-
-#include <algorithm>
-#include <utility>
-
-#include "net/cert/x509_certificate.h"
-#include "net/ssl/ssl_private_key.h"
-
-namespace net {
-
-namespace {
-static base::LazyInstance<ClientKeyStore>::Leaky g_client_key_store =
-    LAZY_INSTANCE_INITIALIZER;
-}  // namespace
-
-ClientKeyStore::ClientKeyStore() {}
-
-ClientKeyStore::~ClientKeyStore() {}
-
-// static
-ClientKeyStore* ClientKeyStore::GetInstance() {
-  return g_client_key_store.Pointer();
-}
-
-void ClientKeyStore::AddProvider(CertKeyProvider* provider) {
-  base::AutoLock auto_lock(lock_);
-  providers_.push_back(provider);
-}
-
-void ClientKeyStore::RemoveProvider(const CertKeyProvider* provider) {
-  base::AutoLock auto_lock(lock_);
-
-  const auto& it = std::find(providers_.begin(), providers_.end(), provider);
-  if (it != providers_.end())
-    providers_.erase(it);
-}
-
-scoped_refptr<SSLPrivateKey> ClientKeyStore::FetchClientCertPrivateKey(
-    const X509Certificate& certificate) {
-  base::AutoLock auto_lock(lock_);
-
-  for (auto* provider : providers_) {
-    scoped_refptr<SSLPrivateKey> key;
-    if (provider->GetCertificateKey(certificate, &key))
-      return key;
-  }
-  return nullptr;
-}
-
-}  // namespace net