Remove usage of ScopedTaskScheduler.

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 06576480f7a6c4eb15a87b3965e7bb724550807b..d1fd90458537cef045f5a57fb4067c94ac0c9a17 100644
--- a/chromeos/network/client_cert_resolver_unittest.cc
+++ b/chromeos/network/client_cert_resolver_unittest.cc
@@ -16,8 +16,9 @@
 #include "base/macros.h"
 #include "base/run_loop.h"
 #include "base/strings/stringprintf.h"
-#include "base/test/scoped_task_scheduler.h"
+#include "base/test/scoped_task_environment.h"
 #include "base/test/simple_test_clock.h"
+#include "base/threading/thread_task_runner_handle.h"
 #include "base/values.h"
 #include "chromeos/cert_loader.h"
 #include "chromeos/dbus/dbus_thread_manager.h"
@@ -53,7 +54,7 @@ const char* kUserHash = "user_hash";
 class ClientCertResolverTest : public testing::Test,
                                public ClientCertResolver::Observer {
  public:
-  ClientCertResolverTest() : scoped_task_scheduler_(&message_loop_) {}
+  ClientCertResolverTest() = default;
   ~ClientCertResolverTest() override {}
 
   void SetUp() override {
@@ -64,7 +65,8 @@ 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());
+    test_nsscertdb_->SetSlowTaskRunnerForTest(
+        base::ThreadTaskRunnerHandle::Get());
 
     DBusThreadManager::Initialize();
     service_test_ =
@@ -326,8 +328,7 @@ class ClientCertResolverTest : public testing::Test,
   std::unique_ptr<NetworkConfigurationHandler> network_config_handler_;
   std::unique_ptr<ManagedNetworkConfigurationHandlerImpl>
       managed_config_handler_;
-  base::MessageLoop message_loop_;
-  base::test::ScopedTaskScheduler scoped_task_scheduler_;
+  base::test::ScopedTaskEnvironment scoped_task_environment_;
   scoped_refptr<net::X509Certificate> test_client_cert_;
   std::string test_ca_cert_pem_;
   crypto::ScopedTestNSSDB test_nssdb_;