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

base/task_scheduler/scheduler_worker_pool_params.cc

Index: base/task_scheduler/scheduler_worker_pool_params.cc
diff --git a/base/task_scheduler/scheduler_worker_pool_params.cc b/base/task_scheduler/scheduler_worker_pool_params.cc
index dbc02f58261c65bf31113c8627ae5c506f5ab718..d08ebf6f85e897f321ec604cf372aaedb0fcf513 100644
--- a/base/task_scheduler/scheduler_worker_pool_params.cc
+++ b/base/task_scheduler/scheduler_worker_pool_params.cc
@@ -11,13 +11,11 @@ namespace base {
 SchedulerWorkerPoolParams::SchedulerWorkerPoolParams(
     const std::string& name,
     ThreadPriority priority_hint,
-    IORestriction io_restriction,
     StandbyThreadPolicy standby_thread_policy,
     int max_threads,
     const TimeDelta& suggested_reclaim_time)
     : name_(name),
       priority_hint_(priority_hint),
-      io_restriction_(io_restriction),
       standby_thread_policy_(standby_thread_policy),
       max_threads_(max_threads),
       suggested_reclaim_time_(suggested_reclaim_time) {}