Create base::test::ScopedTaskScheduler.

base/threading/sequenced_worker_pool_unittest.cc

 // Copyright (c) 2012 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 "base/threading/sequenced_worker_pool.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <memory>
@@ skipping 279 matching lines @@
   }
   TestTracker* tracker() { return tracker_.get(); }
 
   // Waits until no tasks are running in the SequencedWorkerPool and no
   // reference to it remain. Then, destroys the SequencedWorkerPool.
   void DeletePool() { pool_owner_.reset(); }
 
   // Destroys and unregisters the registered TaskScheduler, if any.
   void DeleteTaskScheduler() {
     if (TaskScheduler::GetInstance()) {
-      static_cast<internal::TaskSchedulerImpl*>(TaskScheduler::GetInstance())
-          ->JoinForTesting();
+      TaskScheduler::GetInstance()->JoinForTesting();
       TaskScheduler::SetInstance(nullptr);
     }
   }
 
   void SetWillWaitForShutdownCallback(const Closure& callback) {
     pool_owner_->SetWillWaitForShutdownCallback(callback);
   }
 
   // Ensures that the given number of worker threads is created by adding
   // tasks and waiting until they complete. Worker thread creation is
@@ skipping 929 matching lines @@
     SequencedWorkerPoolSequencedTaskRunner, SequencedTaskRunnerTest,
     SequencedWorkerPoolSequencedTaskRunnerTestDelegate);
 INSTANTIATE_TYPED_TEST_CASE_P(
     SequencedWorkerPoolSequencedTaskRunner,
     SequencedTaskRunnerDelayedTest,
     SequencedWorkerPoolSequencedTaskRunnerTestDelegate);
 
 }  // namespace
 
 }  // namespace base