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/child/idle_canceled_delayed_task_sweeper.h"
 #include "platform/scheduler/child/idle_helper.h"
@@ skipping 15 matching lines @@
   // WorkerScheduler implementation:
   scoped_refptr<TaskQueue> DefaultTaskRunner() override;
   scoped_refptr<SingleThreadIdleTaskRunner> IdleTaskRunner() override;
   bool CanExceedIdleDeadlineIfRequired() const override;
   bool ShouldYieldForHighPriorityWork() override;
   void AddTaskObserver(base::MessageLoop::TaskObserver* task_observer) override;
   void RemoveTaskObserver(
       base::MessageLoop::TaskObserver* task_observer) override;
   void Init() override;
   void Shutdown() override;
+  scoped_refptr<TaskQueue> NewUnthrottledTaskRunner(
+      TaskQueue::QueueType queue_type) override;
 
   SchedulerHelper* GetSchedulerHelperForTesting();
   base::TimeTicks CurrentIdleTaskDeadlineForTesting() const;
 
  protected:
   // IdleHelper::Delegate implementation:
   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_;
   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_