scheduler: Move the Blink scheduler into Blink

components/scheduler/base/task_time_tracker.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 CONTENT_RENDERER_SCHEDULER_BASE_TASK_TIME_TRACKER_H_
-#define CONTENT_RENDERER_SCHEDULER_BASE_TASK_TIME_TRACKER_H_
-
-#include "base/time/time.h"
-#include "components/scheduler/scheduler_export.h"
-
-namespace scheduler {
-
-class SCHEDULER_EXPORT TaskTimeTracker {
- public:
-  TaskTimeTracker() {}
-  virtual ~TaskTimeTracker() {}
-
-  virtual void ReportTaskTime(base::TimeTicks startTime,
-                              base::TimeTicks endTime) = 0;
- private:
-  DISALLOW_COPY_AND_ASSIGN(TaskTimeTracker);
-};
-
-} // namespace scheduler
-
-#endif // CONTENT_RENDERER_SCHEDULER_BASE_TASK_TIME_TRACKER_H_