scheduler: Move the Blink scheduler into Blink

components/scheduler/child/web_task_runner_impl.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/child/web_task_runner_impl.h"
-
-#include "base/bind.h"
-#include "base/location.h"
-#include "base/memory/ptr_util.h"
-#include "components/scheduler/base/task_queue.h"
-#include "components/scheduler/base/time_domain.h"
-#include "third_party/WebKit/public/platform/WebTraceLocation.h"
-
-namespace scheduler {
-
-WebTaskRunnerImpl::WebTaskRunnerImpl(scoped_refptr<TaskQueue> task_queue)
-    : task_queue_(task_queue) {}
-
-WebTaskRunnerImpl::~WebTaskRunnerImpl() {}
-
-void WebTaskRunnerImpl::postTask(const blink::WebTraceLocation& location,
-                                 blink::WebTaskRunner::Task* task) {
-  task_queue_->PostTask(
-      location,
-      base::Bind(&WebTaskRunnerImpl::runTask,
-                 base::Passed(base::WrapUnique(task))));
-}
-
-void WebTaskRunnerImpl::postDelayedTask(
-    const blink::WebTraceLocation& location,
-    blink::WebTaskRunner::Task* task,
-    double delayMs) {
-  DCHECK_GE(delayMs, 0.0);
-  task_queue_->PostDelayedTask(
-      location,
-      base::Bind(&WebTaskRunnerImpl::runTask,
-                 base::Passed(base::WrapUnique(task))),
-      base::TimeDelta::FromMillisecondsD(delayMs));
-}
-
-bool WebTaskRunnerImpl::runsTasksOnCurrentThread() {
-  return task_queue_->RunsTasksOnCurrentThread();
-}
-
-double WebTaskRunnerImpl::virtualTimeSeconds() const {
-  return (Now() - base::TimeTicks::UnixEpoch()).InSecondsF();
-}
-
-double WebTaskRunnerImpl::monotonicallyIncreasingVirtualTimeSeconds() const {
-  return Now().ToInternalValue() /
-         static_cast<double>(base::Time::kMicrosecondsPerSecond);
-}
-
-base::TimeTicks WebTaskRunnerImpl::Now() const {
-  TimeDomain* time_domain = task_queue_->GetTimeDomain();
-  // It's possible task_queue_ has been Unregistered which can lead to a null
-  // TimeDomain.  If that happens just return the current real time.
-  if (!time_domain)
-    return base::TimeTicks::Now();
-  return time_domain->Now();
-}
-
-std::unique_ptr<blink::WebTaskRunner> WebTaskRunnerImpl::clone() {
-  return base::WrapUnique(new WebTaskRunnerImpl(task_queue_));
-}
-
-void WebTaskRunnerImpl::runTask(
-    std::unique_ptr<blink::WebTaskRunner::Task> task) {
-  task->run();
-}
-
-}  // namespace scheduler