TaskScheduler: Add TaskTraits::WithWait().

base/threading/sequenced_worker_pool.cc

Index: base/threading/sequenced_worker_pool.cc
diff --git a/base/threading/sequenced_worker_pool.cc b/base/threading/sequenced_worker_pool.cc
index 61cef6adf6b01c360299b2940f7c473ef3684ac8..b7e93bb72ab92dbade351dbfd73768ce77c5e0da 100644
--- a/base/threading/sequenced_worker_pool.cc
+++ b/base/threading/sequenced_worker_pool.cc
@@ -808,6 +808,7 @@ bool SequencedWorkerPool::Inner::PostTaskToTaskScheduler(
       static_cast<TaskShutdownBehavior>(sequenced.shutdown_behavior);
   const TaskTraits traits = TaskTraits()
                                 .WithFileIO()
+                                .WithWait()
                                 .WithPriority(task_priority_)
                                 .WithShutdownBehavior(task_shutdown_behavior);
   return GetTaskSchedulerTaskRunner(sequenced.sequence_token_id, traits)
@@ -858,7 +859,7 @@ bool SequencedWorkerPool::Inner::RunsTasksOnCurrentThread() const {
   if (g_all_pools_state == AllPoolsState::REDIRECTED_TO_TASK_SCHEDULER) {
     if (!runs_tasks_on_verifier_) {
       runs_tasks_on_verifier_ = CreateTaskRunnerWithTraits(
-          TaskTraits().WithFileIO().WithPriority(task_priority_));
+          TaskTraits().WithFileIO().WithWait().WithPriority(task_priority_));
     }
     return runs_tasks_on_verifier_->RunsTasksOnCurrentThread();
   } else {