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

base/task_scheduler/scheduler_worker_pool_impl.h

Index: base/task_scheduler/scheduler_worker_pool_impl.h
diff --git a/base/task_scheduler/scheduler_worker_pool_impl.h b/base/task_scheduler/scheduler_worker_pool_impl.h
index 8014030b541b6e6d4e5face52c20b02ca8856b9c..b2dc68a4f12c96c79e8e27c41a4187b3a1c6b421 100644
--- a/base/task_scheduler/scheduler_worker_pool_impl.h
+++ b/base/task_scheduler/scheduler_worker_pool_impl.h
@@ -115,8 +115,6 @@ class BASE_EXPORT SchedulerWorkerPoolImpl : public SchedulerWorkerPool {
   class SchedulerWorkerDelegateImpl;
 
   SchedulerWorkerPoolImpl(StringPiece name,
-                          SchedulerWorkerPoolParams::IORestriction
-                              io_restriction,
                           const TimeDelta& suggested_reclaim_time,
                           TaskTracker* task_tracker,
                           DelayedTaskManager* delayed_task_manager);
@@ -162,9 +160,6 @@ class BASE_EXPORT SchedulerWorkerPoolImpl : public SchedulerWorkerPool {
   // 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_;