Use TaskScheduler instead of WorkerPool in nss_cert_database.cc.

chromeos/network/client_cert_resolver_unittest.cc

Index: chromeos/network/client_cert_resolver_unittest.cc
diff --git a/chromeos/network/client_cert_resolver_unittest.cc b/chromeos/network/client_cert_resolver_unittest.cc
index f64629dab784e55b8237a91d509a6eca127a13ff..7ee9cd3696548203bb5ada170d1916f4a7b37553 100644
--- a/chromeos/network/client_cert_resolver_unittest.cc
+++ b/chromeos/network/client_cert_resolver_unittest.cc
@@ -16,6 +16,7 @@
 #include "base/macros.h"
 #include "base/run_loop.h"
 #include "base/strings/stringprintf.h"
+#include "base/test/scoped_task_scheduler.h"
 #include "base/test/simple_test_clock.h"
 #include "base/values.h"
 #include "chromeos/cert_loader.h"
@@ -56,7 +57,8 @@ class ClientCertResolverTest : public testing::Test,
       : network_properties_changed_count_(0),
         service_test_(nullptr),
         profile_test_(nullptr),
-        cert_loader_(nullptr) {}
+        cert_loader_(nullptr),
+        scoped_task_scheduler_(&message_loop_) {}
   ~ClientCertResolverTest() override {}
 
   void SetUp() override {
@@ -66,7 +68,6 @@ class ClientCertResolverTest : public testing::Test,
     test_nsscertdb_.reset(new net::NSSCertDatabaseChromeOS(
         crypto::ScopedPK11Slot(PK11_ReferenceSlot(test_nssdb_.slot())),
         crypto::ScopedPK11Slot(PK11_ReferenceSlot(test_nssdb_.slot()))));
-    test_nsscertdb_->SetSlowTaskRunnerForTest(message_loop_.task_runner());
 
     DBusThreadManager::Initialize();
     service_test_ =
@@ -293,6 +294,7 @@ class ClientCertResolverTest : public testing::Test,
   std::unique_ptr<ManagedNetworkConfigurationHandlerImpl>
       managed_config_handler_;
   base::MessageLoop message_loop_;
+  base::test::ScopedTaskScheduler scoped_task_scheduler_;
   scoped_refptr<net::X509Certificate> test_client_cert_;
   std::string test_ca_cert_pem_;
   crypto::ScopedTestNSSDB test_nssdb_;