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

base/task_scheduler/scheduler_worker_pool_impl.h

 // 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.
 
 #ifndef BASE_TASK_SCHEDULER_SCHEDULER_WORKER_POOL_IMPL_H_
 #define BASE_TASK_SCHEDULER_SCHEDULER_WORKER_POOL_IMPL_H_
 
 #include <stddef.h>
 
 #include <memory>
@@ skipping 97 matching lines @@
 
   // Returns the number of workers alive in this worker pool. The value may
   // change if workers are woken up or detached during this call.
   size_t NumberOfAliveWorkersForTesting();
 
  private:
   class SchedulerSingleThreadTaskRunner;
   class SchedulerWorkerDelegateImpl;
 
   SchedulerWorkerPoolImpl(StringPiece name,
-                          SchedulerWorkerPoolParams::IORestriction
-                              io_restriction,
                           const TimeDelta& suggested_reclaim_time,
                           TaskTracker* task_tracker,
                           DelayedTaskManager* delayed_task_manager);
 
   bool Initialize(
       ThreadPriority priority_hint,
       SchedulerWorkerPoolParams::StandbyThreadPolicy standby_thread_policy,
       size_t max_threads,
       const ReEnqueueSequenceCallback& re_enqueue_sequence_callback);
 
@@ skipping 25 matching lines @@
   // Synchronizes access to |next_worker_index_|.
   SchedulerLock next_worker_index_lock_;
 
   // Index of the worker that will be assigned to the next single-threaded
   // TaskRunner returned by this pool.
   size_t next_worker_index_ = 0;
 
   // PriorityQueue from which all threads of this worker pool get work.
   PriorityQueue shared_priority_queue_;
 
-  // Indicates whether Tasks on this worker pool are allowed to make I/O calls.
-  const SchedulerWorkerPoolParams::IORestriction io_restriction_;
-
   // Suggested reclaim time for workers.
   const TimeDelta suggested_reclaim_time_;
 
   // Synchronizes access to |idle_workers_stack_| and
   // |idle_workers_stack_cv_for_testing_|. Has |shared_priority_queue_|'s
   // lock as its predecessor so that a worker can be pushed to
   // |idle_workers_stack_| within the scope of a Transaction (more
   // details in GetWork()).
   mutable SchedulerLock idle_workers_stack_lock_;
 
@@ skipping 42 matching lines @@
   TaskTracker* const task_tracker_;
   DelayedTaskManager* const delayed_task_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(SchedulerWorkerPoolImpl);
 };
 
 }  // namespace internal
 }  // namespace base
 
 #endif  // BASE_TASK_SCHEDULER_SCHEDULER_WORKER_POOL_IMPL_H_