scheduler: Move the Blink scheduler into Blink

components/scheduler/child/web_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 CONTENT_CHILD_SCHEDULER_BASE_WEB_SCHEDULER_IMPL_H_
-#define CONTENT_CHILD_SCHEDULER_BASE_WEB_SCHEDULER_IMPL_H_
-
-#include <memory>
-
-#include "base/memory/ref_counted.h"
-#include "base/time/time.h"
-#include "components/scheduler/scheduler_export.h"
-#include "third_party/WebKit/public/platform/WebScheduler.h"
-#include "third_party/WebKit/public/platform/WebThread.h"
-
-namespace scheduler {
-
-class ChildScheduler;
-class SingleThreadIdleTaskRunner;
-class TaskQueue;
-class WebTaskRunnerImpl;
-
-class SCHEDULER_EXPORT WebSchedulerImpl : public blink::WebScheduler {
- public:
-  WebSchedulerImpl(ChildScheduler* child_scheduler,
-                   scoped_refptr<SingleThreadIdleTaskRunner> idle_task_runner,
-                   scoped_refptr<TaskQueue> loading_task_runner,
-                   scoped_refptr<TaskQueue> timer_task_runner);
-  ~WebSchedulerImpl() override;
-
-  // blink::WebScheduler implementation:
-  void shutdown() override;
-  bool shouldYieldForHighPriorityWork() override;
-  bool canExceedIdleDeadlineIfRequired() override;
-  void postIdleTask(const blink::WebTraceLocation& location,
-                    blink::WebThread::IdleTask* task) override;
-  void postNonNestableIdleTask(const blink::WebTraceLocation& location,
-                               blink::WebThread::IdleTask* task) override;
-  void postIdleTaskAfterWakeup(const blink::WebTraceLocation& location,
-                               blink::WebThread::IdleTask* task) override;
-  blink::WebTaskRunner* loadingTaskRunner() override;
-  blink::WebTaskRunner* timerTaskRunner() override;
-  std::unique_ptr<blink::WebViewScheduler> createWebViewScheduler(
-      blink::WebView*) override;
-  void suspendTimerQueue() override {}
-  void resumeTimerQueue() override {}
-  void addPendingNavigation(
-      blink::WebScheduler::NavigatingFrameType type) override {}
-  void removePendingNavigation(
-      blink::WebScheduler::NavigatingFrameType type) override {}
-  void onNavigationStarted() override {}
-
- private:
-  static void runIdleTask(std::unique_ptr<blink::WebThread::IdleTask> task,
-                          base::TimeTicks deadline);
-
-  ChildScheduler* child_scheduler_;  // NOT OWNED
-  scoped_refptr<SingleThreadIdleTaskRunner> idle_task_runner_;
-  scoped_refptr<TaskQueue> timer_task_runner_;
-  std::unique_ptr<WebTaskRunnerImpl> loading_web_task_runner_;
-  std::unique_ptr<WebTaskRunnerImpl> timer_web_task_runner_;
-};
-
-}  // namespace scheduler
-
-#endif  // CONTENT_CHILD_SCHEDULER_BASE_WEB_SCHEDULER_IMPL_H_