Make NSSCertDatabase::ListCerts work async on a worker thread.

chromeos/network/network_cert_migrator_unittest.cc

 // Copyright 2013 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 "chromeos/network/network_cert_migrator.h"
 
 #include <cert.h>
 
 #include "base/file_util.h"
 #include "base/files/file_path.h"
@@ skipping 35 matching lines @@
 
   virtual void SetUp() OVERRIDE {
     // Initialize NSS db for the user.
     ASSERT_TRUE(user_.constructed_successfully());
     user_.FinishInit();
     test_nssdb_.reset(new net::NSSCertDatabaseChromeOS(
         crypto::GetPublicSlotForChromeOSUser(user_.username_hash()),
         crypto::GetPrivateSlotForChromeOSUser(
             user_.username_hash(),
             base::Callback<void(crypto::ScopedPK11Slot)>())));
+    test_nssdb_->SetSlowTaskRunnerForTest(message_loop_.message_loop_proxy());
 
     DBusThreadManager::InitializeWithStub();
     service_test_ =
         DBusThreadManager::Get()->GetShillServiceClient()->GetTestInterface();
     base::RunLoop().RunUntilIdle();
     service_test_->ClearServices();
     base::RunLoop().RunUntilIdle();
 
     CertLoader::Initialize();
     CertLoader* cert_loader_ = CertLoader::Get();
-    cert_loader_->SetSlowTaskRunnerForTest(message_loop_.message_loop_proxy());
     cert_loader_->set_hardware_backed_for_test();
     cert_loader_->StartWithNSSDB(test_nssdb_.get());
   }
 
   virtual void TearDown() OVERRIDE {
     network_cert_migrator_.reset();
     network_state_handler_.reset();
     CertLoader::Shutdown();
     DBusThreadManager::Shutdown();
     CleanupTestCert();
@@ skipping 183 matching lines @@
   SetupNetworkHandlers();
 
   base::RunLoop().RunUntilIdle();
   std::string nss_nickname, ca_pem;
   GetVpnCACertProperties(false /* not OpenVPN */, &nss_nickname, &ca_pem);
   EXPECT_TRUE(nss_nickname.empty());
   EXPECT_EQ(test_ca_cert_pem_, ca_pem);
 }
 
 }  // namespace chromeos