scheduler: Move the Blink scheduler into Blink

components/scheduler/child/worker_scheduler_impl.cc

-// Copyright 2014 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.
-
-#include "components/scheduler/child/worker_scheduler_impl.h"
-
-#include "base/bind.h"
-#include "base/trace_event/trace_event.h"
-#include "base/trace_event/trace_event_argument.h"
-#include "components/scheduler/base/task_queue.h"
-#include "components/scheduler/child/scheduler_tqm_delegate.h"
-
-namespace scheduler {
-
-WorkerSchedulerImpl::WorkerSchedulerImpl(
-    scoped_refptr<SchedulerTqmDelegate> main_task_runner)
-    : helper_(main_task_runner,
-              "worker.scheduler",
-              TRACE_DISABLED_BY_DEFAULT("worker.scheduler"),
-              TRACE_DISABLED_BY_DEFAULT("worker.scheduler.debug")),
-      idle_helper_(&helper_,
-                   this,
-                   "worker.scheduler",
-                   TRACE_DISABLED_BY_DEFAULT("worker.scheduler"),
-                   "WorkerSchedulerIdlePeriod",
-                   base::TimeDelta::FromMilliseconds(300)) {
-  initialized_ = false;
-  TRACE_EVENT_OBJECT_CREATED_WITH_ID(
-      TRACE_DISABLED_BY_DEFAULT("worker.scheduler"), "WorkerScheduler", this);
-}
-
-WorkerSchedulerImpl::~WorkerSchedulerImpl() {
-  TRACE_EVENT_OBJECT_DELETED_WITH_ID(
-      TRACE_DISABLED_BY_DEFAULT("worker.scheduler"), "WorkerScheduler", this);
-}
-
-void WorkerSchedulerImpl::Init() {
-  initialized_ = true;
-  idle_helper_.EnableLongIdlePeriod();
-}
-
-scoped_refptr<TaskQueue> WorkerSchedulerImpl::DefaultTaskRunner() {
-  DCHECK(initialized_);
-  return helper_.DefaultTaskRunner();
-}
-
-scoped_refptr<SingleThreadIdleTaskRunner>
-WorkerSchedulerImpl::IdleTaskRunner() {
-  DCHECK(initialized_);
-  return idle_helper_.IdleTaskRunner();
-}
-
-bool WorkerSchedulerImpl::CanExceedIdleDeadlineIfRequired() const {
-  DCHECK(initialized_);
-  return idle_helper_.CanExceedIdleDeadlineIfRequired();
-}
-
-bool WorkerSchedulerImpl::ShouldYieldForHighPriorityWork() {
-  // We don't consider any work as being high priority on workers.
-  return false;
-}
-
-void WorkerSchedulerImpl::AddTaskObserver(
-    base::MessageLoop::TaskObserver* task_observer) {
-  DCHECK(initialized_);
-  helper_.AddTaskObserver(task_observer);
-}
-
-void WorkerSchedulerImpl::RemoveTaskObserver(
-    base::MessageLoop::TaskObserver* task_observer) {
-  DCHECK(initialized_);
-  helper_.RemoveTaskObserver(task_observer);
-}
-
-void WorkerSchedulerImpl::Shutdown() {
-  DCHECK(initialized_);
-  helper_.Shutdown();
-}
-
-SchedulerHelper* WorkerSchedulerImpl::GetSchedulerHelperForTesting() {
-  return &helper_;
-}
-
-bool WorkerSchedulerImpl::CanEnterLongIdlePeriod(base::TimeTicks,
-                                                 base::TimeDelta*) {
-  return true;
-}
-
-base::TimeTicks WorkerSchedulerImpl::CurrentIdleTaskDeadlineForTesting() const {
-  return idle_helper_.CurrentIdleTaskDeadline();
-}
-
-}  // namespace scheduler