TaskScheduler: Remove base/task_scheduler/utils.h/.cc

base/task_scheduler/scheduler_task_executor.h

-// Copyright 2016 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_TASK_EXECUTOR_H_
-#define BASE_TASK_SCHEDULER_SCHEDULER_TASK_EXECUTOR_H_
-
-#include <memory>
-
-#include "base/base_export.h"
-#include "base/memory/ref_counted.h"
-#include "base/task_scheduler/sequence.h"
-#include "base/task_scheduler/task.h"
-
-namespace base {
-namespace internal {
-
-// Interface for a component that runs Tasks.
-class BASE_EXPORT SchedulerTaskExecutor {
- public:
-  virtual ~SchedulerTaskExecutor() = default;
-
-  // Posts |task| to be executed by this component as part of |sequence|. The
-  // scheduler's TaskTracker must have allowed |task| to be posted before this
-  // is called. This must only be called after |task|'s delayed run time.
-  virtual void PostTaskWithSequence(std::unique_ptr<Task> task,
-                                    scoped_refptr<Sequence> sequence) = 0;
-};
-
-}  // namespace internal
-}  // namespace base
-
-#endif  // BASE_TASK_SCHEDULER_SCHEDULER_TASK_EXECUTOR_H_