TaskScheduler: Set the IO allowed bit in TaskTracker::RunTask().

base/test/scoped_task_scheduler.cc

 // Copyright 2016 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/test/scoped_task_scheduler.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/task_scheduler/scheduler_worker_pool_params.h"
 #include "base/task_scheduler/task_scheduler.h"
 #include "base/threading/platform_thread.h"
 #include "base/time/time.h"
 
 namespace base {
 namespace test {
 
 ScopedTaskScheduler::ScopedTaskScheduler() {
   DCHECK(!TaskScheduler::GetInstance());
 
   // Create a TaskScheduler with a single thread to make tests deterministic.
   constexpr int kMaxThreads = 1;
   std::vector<SchedulerWorkerPoolParams> worker_pool_params_vector;
   worker_pool_params_vector.emplace_back(
       "Simple", ThreadPriority::NORMAL,
-      SchedulerWorkerPoolParams::IORestriction::ALLOWED,
       SchedulerWorkerPoolParams::StandbyThreadPolicy::LAZY, kMaxThreads,
       TimeDelta::Max());
   TaskScheduler::CreateAndSetDefaultTaskScheduler(
       worker_pool_params_vector,
       Bind([](const TaskTraits&) -> size_t { return 0; }));
   task_scheduler_ = TaskScheduler::GetInstance();
 }
 
 ScopedTaskScheduler::~ScopedTaskScheduler() {
   DCHECK_EQ(task_scheduler_, TaskScheduler::GetInstance());
   TaskScheduler::GetInstance()->Shutdown();
   TaskScheduler::GetInstance()->JoinForTesting();
   TaskScheduler::SetInstance(nullptr);
 }
 
 }  // namespace test
 }  // namespace base