scheduler: Move the Blink scheduler into Blink

content/utility/webthread_impl_for_utility_thread.h

-// Copyright 2015 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 CONTENT_UTILITY_WEBTHREAD_IMPL_FOR_UTILITY_THREAD_H_
-#define CONTENT_UTILITY_WEBTHREAD_IMPL_FOR_UTILITY_THREAD_H_
-
-#include "base/macros.h"
-#include "base/memory/ref_counted.h"
-#include "components/scheduler/child/webthread_base.h"
-
-namespace content {
-
-class WebThreadImplForUtilityThread : public scheduler::WebThreadBase {
- public:
-  WebThreadImplForUtilityThread();
-  ~WebThreadImplForUtilityThread() override;
-
-  // blink::WebThread implementation.
-  blink::WebScheduler* scheduler() const override;
-  blink::PlatformThreadId threadId() const override;
-
-  // WebThreadBase implementation.
-  base::SingleThreadTaskRunner* GetTaskRunner() const override;
-  scheduler::SingleThreadIdleTaskRunner* GetIdleTaskRunner() const override;
-
- private:
-  scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
-  blink::PlatformThreadId thread_id_;
-
-  DISALLOW_COPY_AND_ASSIGN(WebThreadImplForUtilityThread);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_UTILITY_WEBTHREAD_IMPL_FOR_UTILITY_THREAD_H_