scheduler: Move the Blink scheduler into Blink

components/scheduler/renderer/throttled_time_domain.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 COMPONENTS_SCHEDULER_RENDERER_THROTTLED_TIME_DOMAIN_H_
-#define COMPONENTS_SCHEDULER_RENDERER_THROTTLED_TIME_DOMAIN_H_
-
-#include "base/macros.h"
-#include "components/scheduler/base/real_time_domain.h"
-
-namespace scheduler {
-
-// A time domain for throttled tasks. behaves like an RealTimeDomain except it
-// relies on the owner (ThrottlingHelper) to schedule wakeups.
-class SCHEDULER_EXPORT ThrottledTimeDomain : public RealTimeDomain {
- public:
-  ThrottledTimeDomain(TimeDomain::Observer* observer,
-                      const char* tracing_category);
-  ~ThrottledTimeDomain() override;
-
-  // TimeDomain implementation:
-  const char* GetName() const override;
-  void RequestWakeup(base::TimeTicks now, base::TimeDelta delay) override;
-  bool MaybeAdvanceTime() override;
-
-  using TimeDomain::ClearExpiredWakeups;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(ThrottledTimeDomain);
-};
-
-}  // namespace scheduler
-
-#endif  // COMPONENTS_SCHEDULER_RENDERER_THROTTLED_TIME_DOMAIN_H_