Scheduler: Deprecate CancellableTaskFactory in favor of WebTaskRunner::postCancellableTask (3)

third_party/WebKit/Source/platform/scheduler/CancellableTaskFactory.cpp

-// 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 "platform/scheduler/CancellableTaskFactory.h"
-
-#include "public/platform/Platform.h"
-
-namespace blink {
-
-void CancellableTaskFactory::cancel() {
-  m_weakPtrFactory.revokeAll();
-}
-
-WebTaskRunner::Task* CancellableTaskFactory::cancelAndCreate() {
-  cancel();
-  return new CancellableTask(m_weakPtrFactory.createWeakPtr());
-}
-
-void CancellableTaskFactory::CancellableTask::run() {
-  if (CancellableTaskFactory* taskFactory = m_weakPtr.get()) {
-    WTF::Closure* closure = taskFactory->m_closure.get();
-    taskFactory->m_weakPtrFactory.revokeAll();
-    (*closure)();
-  }
-}
-
-}  // namespace blink