scheduler: Move the Blink scheduler into Blink

components/scheduler/base/real_time_domain.cc

-// 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.
-
-#include "components/scheduler/base/real_time_domain.h"
-
-#include "base/bind.h"
-#include "components/scheduler/base/task_queue_impl.h"
-#include "components/scheduler/base/task_queue_manager.h"
-#include "components/scheduler/base/task_queue_manager_delegate.h"
-
-namespace scheduler {
-
-RealTimeDomain::RealTimeDomain(const char* tracing_category)
-    : TimeDomain(nullptr),
-      tracing_category_(tracing_category),
-      task_queue_manager_(nullptr) {}
-
-RealTimeDomain::RealTimeDomain(TimeDomain::Observer* observer,
-                               const char* tracing_category)
-    : TimeDomain(observer),
-      tracing_category_(tracing_category),
-      task_queue_manager_(nullptr) {}
-
-RealTimeDomain::~RealTimeDomain() {}
-
-void RealTimeDomain::OnRegisterWithTaskQueueManager(
-    TaskQueueManager* task_queue_manager) {
-  task_queue_manager_ = task_queue_manager;
-  DCHECK(task_queue_manager_);
-}
-
-LazyNow RealTimeDomain::CreateLazyNow() const {
-  return task_queue_manager_->CreateLazyNow();
-}
-
-base::TimeTicks RealTimeDomain::Now() const {
-  return task_queue_manager_->delegate()->NowTicks();
-}
-
-void RealTimeDomain::RequestWakeup(base::TimeTicks now, base::TimeDelta delay) {
-  // NOTE this is only called if the scheduled runtime is sooner than any
-  // previously scheduled runtime, or there is no (outstanding) previously
-  // scheduled runtime.
-  task_queue_manager_->MaybeScheduleDelayedWork(FROM_HERE, now, delay);
-}
-
-bool RealTimeDomain::MaybeAdvanceTime() {
-  base::TimeTicks next_run_time;
-  if (!NextScheduledRunTime(&next_run_time))
-    return false;
-
-  base::TimeTicks now = Now();
-  if (now >= next_run_time)
-    return true;  // Causes DoWork to post a continuation.
-
-  base::TimeDelta delay = next_run_time - now;
-  TRACE_EVENT1(tracing_category_, "RealTimeDomain::MaybeAdvanceTime",
-               "delay_ms", delay.InMillisecondsF());
-
-  // The next task is sometime in the future, make sure we schedule a DoWork to
-  // run it.
-  task_queue_manager_->MaybeScheduleDelayedWork(FROM_HERE, now, delay);
-  return false;
-}
-
-void RealTimeDomain::AsValueIntoInternal(
-    base::trace_event::TracedValue* state) const {}
-
-const char* RealTimeDomain::GetName() const {
-  return "RealTimeDomain";
-}
-}  // namespace scheduler