Revert of Use TaskScheduler instead of WorkerPool in nss_cert_database.cc.

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 <memory>
 #include <string>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "base/run_loop.h"
+#include "base/threading/thread_task_runner_handle.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_internal.h"
 #include "crypto/scoped_test_nss_chromeos_user.h"
 #include "net/base/test_completion_callback.h"
 #include "net/cert/cert_verify_result.h"
 #include "net/cert/nss_cert_database_chromeos.h"
 #include "net/cert/x509_certificate.h"
 #include "net/log/net_log_with_source.h"
@@ skipping 12 matching lines @@
 
   void SetUp() override {
     ASSERT_TRUE(test_nss_user_.constructed_successfully());
     test_nss_user_.FinishInit();
 
     test_cert_db_.reset(new net::NSSCertDatabaseChromeOS(
         crypto::GetPublicSlotForChromeOSUser(test_nss_user_.username_hash()),
         crypto::GetPrivateSlotForChromeOSUser(
             test_nss_user_.username_hash(),
             base::Callback<void(crypto::ScopedPK11Slot)>())));
+    test_cert_db_->SetSlowTaskRunnerForTest(
+        base::ThreadTaskRunnerHandle::Get());
 
     cert_verifier_.reset(new PolicyCertVerifier(base::Bind(
         &PolicyCertVerifierTest::OnTrustAnchorUsed, base::Unretained(this))));
     cert_verifier_->InitializeOnIOThread(new chromeos::CertVerifyProcChromeOS(
         crypto::GetPublicSlotForChromeOSUser(test_nss_user_.username_hash())));
 
     test_ca_cert_ = LoadCertificate("root_ca_cert.pem", net::CA_CERT);
     ASSERT_TRUE(test_ca_cert_.get());
     test_server_cert_ = LoadCertificate("ok_cert.pem", net::SERVER_CERT);
     ASSERT_TRUE(test_server_cert_.get());
@@ skipping 168 matching lines @@
     int error = VerifyTestServerCert(callback, &verify_result, &request);
     // 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