Worker: Introduce per-global-scope task scheduler

third_party/WebKit/public/platform/scheduler/child/compositor_worker_scheduler.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 THIRD_PARTY_WEBKIT_PUBLIC_PLATFORM_SCHEDULER_CHILD_COMPOSITOR_WORKER_SCHEDULER_H_
 #define THIRD_PARTY_WEBKIT_PUBLIC_PLATFORM_SCHEDULER_CHILD_COMPOSITOR_WORKER_SCHEDULER_H_
 
 #include "base/macros.h"
 #include "public/platform/scheduler/child/single_thread_idle_task_runner.h"
 #include "public/platform/scheduler/child/worker_scheduler.h"
@@ skipping 19 matching lines @@
   // ChildScheduler:
   scoped_refptr<TaskQueue> DefaultTaskRunner() override;
   scoped_refptr<scheduler::SingleThreadIdleTaskRunner> IdleTaskRunner()
       override;
   bool ShouldYieldForHighPriorityWork() override;
   bool CanExceedIdleDeadlineIfRequired() const override;
   void AddTaskObserver(base::MessageLoop::TaskObserver* task_observer) override;
   void RemoveTaskObserver(
       base::MessageLoop::TaskObserver* task_observer) override;
   void Shutdown() override;
+  scoped_refptr<TaskQueue> NewUnthrottledTaskRunner(
+      TaskQueue::QueueType queue_type) override {
+    // TODO
+    return nullptr;
+  }
 
   // SingleThreadIdleTaskRunner::Delegate:
   void OnIdleTaskPosted() override;
   base::TimeTicks WillProcessIdleTask() override;
   void DidProcessIdleTask() override;
   base::TimeTicks NowTicks() override;
 
  private:
   base::Thread* thread_;
 
   DISALLOW_COPY_AND_ASSIGN(CompositorWorkerScheduler);
 };
 
 }  // namespace scheduler
 }  // namespace blink
 
 #endif  // THIRD_PARTY_WEBKIT_PUBLIC_PLATFORM_SCHEDULER_CHILD_COMPOSITOR_WORKER_SCHEDULER_H_