Revert of Introduce SchedulerSingleThreadTaskRunnerManager

base/task_scheduler/scheduler_single_thread_task_runner_manager.h

Index: base/task_scheduler/scheduler_single_thread_task_runner_manager.h
diff --git a/base/task_scheduler/scheduler_single_thread_task_runner_manager.h b/base/task_scheduler/scheduler_single_thread_task_runner_manager.h
deleted file mode 100644
index 3b0ffd4fbf6726be7724459408437c8a6d0cd241..0000000000000000000000000000000000000000
--- a/base/task_scheduler/scheduler_single_thread_task_runner_manager.h
+++ /dev/null
@@ -1,68 +0,0 @@
-// Copyright 2017 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.
-
-#ifndef BASE_TASK_SCHEDULER_SCHEDULER_SINGLE_THREAD_TASK_RUNNER_MANAGER_H_
-#define BASE_TASK_SCHEDULER_SCHEDULER_SINGLE_THREAD_TASK_RUNNER_MANAGER_H_
-
-#include <vector>
-
-#include "base/base_export.h"
-#include "base/macros.h"
-#include "base/memory/ref_counted.h"
-#include "base/task_scheduler/scheduler_lock.h"
-#include "base/task_scheduler/scheduler_worker_pool_params.h"
-#include "base/task_scheduler/task_scheduler.h"
-
-namespace base {
-
-class TaskTraits;
-class SingleThreadTaskRunner;
-
-namespace internal {
-
-class DelayedTaskManager;
-class SchedulerWorker;
-class TaskTracker;
-
-class BASE_EXPORT SchedulerSingleThreadTaskRunnerManager final {
- public:
-  SchedulerSingleThreadTaskRunnerManager(
-      const std::vector<SchedulerWorkerPoolParams>& worker_pool_params_vector,
-      const TaskScheduler::WorkerPoolIndexForTraitsCallback&
-          worker_pool_index_for_traits_callback,
-      TaskTracker* task_tracker,
-      DelayedTaskManager* delayed_task_manager);
-  ~SchedulerSingleThreadTaskRunnerManager();
-
-  scoped_refptr<SingleThreadTaskRunner> CreateSingleThreadTaskRunnerWithTraits(
-      const TaskTraits& traits);
-
-  void JoinForTesting();
-
- private:
-  class SchedulerSingleThreadTaskRunner;
-
-  SchedulerWorker* CreateAndRegisterSchedulerWorker(
-      const SchedulerWorkerPoolParams& params);
-
-  void UnregisterSchedulerWorker(SchedulerWorker* worker);
-
-  const std::vector<SchedulerWorkerPoolParams> worker_pool_params_vector_;
-  const TaskScheduler::WorkerPoolIndexForTraitsCallback
-      worker_pool_index_for_traits_callback_;
-  TaskTracker* const task_tracker_;
-  DelayedTaskManager* const delayed_task_manager_;
-
-  // Synchronizes access to |workers_| and |worker_id_|.
-  SchedulerLock workers_lock_;
-  std::vector<scoped_refptr<SchedulerWorker>> workers_;
-  int next_worker_id_ = 0;
-
-  DISALLOW_COPY_AND_ASSIGN(SchedulerSingleThreadTaskRunnerManager);
-};
-
-}  // namespace internal
-}  // namespace base
-
-#endif  // BASE_TASK_SCHEDULER_SCHEDULER_SINGLE_THREAD_TASK_RUNNER_MANAGER_H_