net: extract net/cert out of net/base

net/base/cert_database_ios.cc

-// Copyright (c) 2012 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/base/cert_database.h"
-
-#include "base/logging.h"
-#include "base/observer_list_threadsafe.h"
-#include "net/base/net_errors.h"
-
-namespace net {
-
-CertDatabase::CertDatabase()
-    : observer_list_(new ObserverListThreadSafe<Observer>) {}
-
-CertDatabase::~CertDatabase() {}
-
-int CertDatabase::CheckUserCert(X509Certificate* cert_obj) {
-  // iOS doesn't handle user certificates.
-  NOTREACHED();
-  return OK;
-}
-
-int CertDatabase::AddUserCert(X509Certificate* cert_obj) {
-  // iOS doesn't handle user certificates.
-  NOTREACHED();
-  return OK;
-}
-
-}  // namespace net