Move base/thread_task_runner_handle.h to base/threading/thread_task_runner_handle.h

base/thread_task_runner_handle.cc

-// Copyright (c) 2012 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 "base/thread_task_runner_handle.h"
-
-#include <utility>
-
-#include "base/lazy_instance.h"
-#include "base/logging.h"
-#include "base/single_thread_task_runner.h"
-#include "base/threading/sequenced_task_runner_handle.h"
-#include "base/threading/thread_local.h"
-
-namespace base {
-
-namespace {
-
-base::LazyInstance<base::ThreadLocalPointer<ThreadTaskRunnerHandle>>::Leaky
-    lazy_tls_ptr = LAZY_INSTANCE_INITIALIZER;
-
-}  // namespace
-
-// static
-scoped_refptr<SingleThreadTaskRunner> ThreadTaskRunnerHandle::Get() {
-  ThreadTaskRunnerHandle* current = lazy_tls_ptr.Pointer()->Get();
-  DCHECK(current);
-  return current->task_runner_;
-}
-
-// static
-bool ThreadTaskRunnerHandle::IsSet() {
-  return !!lazy_tls_ptr.Pointer()->Get();
-}
-
-ThreadTaskRunnerHandle::ThreadTaskRunnerHandle(
-    scoped_refptr<SingleThreadTaskRunner> task_runner)
-    : task_runner_(std::move(task_runner)) {
-  DCHECK(task_runner_->BelongsToCurrentThread());
-  // No SequencedTaskRunnerHandle (which includes ThreadTaskRunnerHandles)
-  // should already be set for this thread.
-  DCHECK(!SequencedTaskRunnerHandle::IsSet());
-  lazy_tls_ptr.Pointer()->Set(this);
-}
-
-ThreadTaskRunnerHandle::~ThreadTaskRunnerHandle() {
-  DCHECK(task_runner_->BelongsToCurrentThread());
-  DCHECK_EQ(lazy_tls_ptr.Pointer()->Get(), this);
-  lazy_tls_ptr.Pointer()->Set(nullptr);
-}
-
-}  // namespace base