Extract ScopedTestNSSDB from nss_util.

chrome/browser/chromeos/policy/policy_cert_verifier_browsertest.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 "chrome/browser/chromeos/policy/policy_cert_verifier.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/run_loop.h"
 #include "chrome/browser/chromeos/net/cert_verify_proc_chromeos.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/test/test_browser_thread_bundle.h"
-#include "crypto/nss_util.h"
 #include "crypto/nss_util_internal.h"
+#include "crypto/scoped_test_nss_chromeos_user.h"
 #include "net/base/net_log.h"
 #include "net/base/test_completion_callback.h"
 #include "net/base/test_data_directory.h"
 #include "net/cert/cert_trust_anchor_provider.h"
 #include "net/cert/cert_verify_result.h"
 #include "net/cert/nss_cert_database_chromeos.h"
 #include "net/cert/x509_certificate.h"
 #include "net/test/cert_test_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ skipping 198 matching lines @@
     int error = VerifyTestServerCert(callback, &verify_result, &request_handle);
     // Note: this hits the cached result from the first Verify() in this test.
     EXPECT_EQ(net::ERR_CERT_AUTHORITY_INVALID, error);
   }
   // The additional trust anchors were reset, thus |cert_verifier_| should not
   // signal it's usage anymore.
   EXPECT_FALSE(WasTrustAnchorUsedAndReset());
 }
 
 }  // namespace policy