Revert of Worker: Introduce per-global-scope task scheduler

third_party/WebKit/Source/platform/scheduler/child/worker_scheduler_impl.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 THIRD_PARTY_WEBKIT_SOURCE_PLATFORM_SCHEDULER_CHILD_WORKER_SCHEDULER_IMPL_H_
 #define THIRD_PARTY_WEBKIT_SOURCE_PLATFORM_SCHEDULER_CHILD_WORKER_SCHEDULER_IMPL_H_
 
 #include "base/macros.h"
 #include "platform/scheduler/base/thread_load_tracker.h"
 #include "platform/scheduler/child/idle_canceled_delayed_task_sweeper.h"
 #include "platform/scheduler/child/idle_helper.h"
+#include "platform/scheduler/child/scheduler_helper.h"
 #include "platform/scheduler/child/worker_scheduler.h"
 #include "public/platform/scheduler/base/task_time_observer.h"
 
 namespace blink {
 namespace scheduler {
 
 class SchedulerTqmDelegate;
 
 class BLINK_PLATFORM_EXPORT WorkerSchedulerImpl : public WorkerScheduler,
                                                   public IdleHelper::Delegate,
@@ skipping 29 matching lines @@
   bool CanEnterLongIdlePeriod(
       base::TimeTicks now,
       base::TimeDelta* next_long_idle_period_delay_out) override;
   void IsNotQuiescent() override {}
   void OnIdlePeriodStarted() override {}
   void OnIdlePeriodEnded() override {}
 
  private:
   void MaybeStartLongIdlePeriod();
 
+  SchedulerHelper helper_;
   IdleHelper idle_helper_;
   IdleCanceledDelayedTaskSweeper idle_canceled_delayed_task_sweeper_;
   ThreadLoadTracker load_tracker_;
   bool initialized_;
   base::TimeTicks thread_start_time_;
 
   DISALLOW_COPY_AND_ASSIGN(WorkerSchedulerImpl);
 };
 
 }  // namespace scheduler
 }  // namespace blink
 
 #endif  // THIRD_PARTY_WEBKIT_SOURCE_PLATFORM_SCHEDULER_CHILD_WORKER_SCHEDULER_IMPL_H_