Extract ScopedTestNSSDB from nss_util.

crypto/scoped_test_nss_db.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_db.h"
+
+#include "base/logging.h"
+#include "base/threading/thread_restrictions.h"
+#include "crypto/nss_util.h"
+#include "crypto/nss_util_internal.h"
+
+namespace crypto {
+
+ScopedTestNSSDB::ScopedTestNSSDB() {
+  EnsureNSSInit();
+  // NSS is allowed to do IO on the current thread since dispatching
+  // to a dedicated thread would still have the affect of blocking
+  // the current thread, due to NSS's internal locking requirements
+  base::ThreadRestrictions::ScopedAllowIO allow_io;
+
+  if (!temp_dir_.CreateUniqueTempDir())
+    return;
+
+  const char kTestDescription[] = "Test DB";
+  slot_ = OpenSoftwareNSSDB(temp_dir_.path(), kTestDescription);
+}
+
+ScopedTestNSSDB::~ScopedTestNSSDB() {
+  // Don't close when NSS is < 3.15.1, because it would require an additional
+  // sleep for 1 second after closing the database, due to
+  // http://bugzil.la/875601.
+  if (!NSS_VersionCheck("3.15.1") || !slot_)
+    return;
+
+  // NSS is allowed to do IO on the current thread since dispatching
+  // to a dedicated thread would still have the affect of blocking
+  // the current thread, due to NSS's internal locking requirements
+  base::ThreadRestrictions::ScopedAllowIO allow_io;
+
+  SECStatus status = SECMOD_CloseUserDB(slot_.get());
+  if (status != SECSuccess)
+    PLOG(ERROR) << "SECMOD_CloseUserDB failed: " << PORT_GetError();
+
+  if (!temp_dir_.Delete())
+    LOG(ERROR) << "Could not delete temporary directory.";
+}
+
+}  // namespace crypto