Extract ScopedTestNSSDB from nss_util.

crypto/scoped_test_nss_chromeos_user.cc

+// Copyright 2014 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 "crypto/scoped_test_nss_chromeos_user.h"
+
+#include "base/logging.h"
+#include "crypto/nss_util.h"
+#include "crypto/nss_util_internal.h"
+
+namespace crypto {
+
+ScopedTestNSSChromeOSUser::ScopedTestNSSChromeOSUser(
+    const std::string& username_hash)
+    : username_hash_(username_hash), constructed_successfully_(false) {
+  if (!temp_dir_.CreateUniqueTempDir())
+    return;
+  // This opens a software DB in the given folder. In production code that is in
+  // the home folder, but for testing the temp folder is used.
+  constructed_successfully_ = InitializeNSSForChromeOSUser(
+      username_hash, username_hash, temp_dir_.path());
+}
+
+ScopedTestNSSChromeOSUser::~ScopedTestNSSChromeOSUser() {
+  if (constructed_successfully_)
+    CloseChromeOSUserForTesting(username_hash_);
+}
+
+void ScopedTestNSSChromeOSUser::FinishInit() {
+  DCHECK(constructed_successfully_);
+  if (!ShouldInitializeTPMForChromeOSUser(username_hash_))
+    return;
+  WillInitializeTPMForChromeOSUser(username_hash_);
+  InitializePrivateSoftwareSlotForChromeOSUser(username_hash_);
+}
+
+}  // namespace crypto