SchedulerWorker Refcounting for Destruction in Production

base/task_scheduler/scheduler_worker_stack_unittest.cc

Index: base/task_scheduler/scheduler_worker_stack_unittest.cc
diff --git a/base/task_scheduler/scheduler_worker_stack_unittest.cc b/base/task_scheduler/scheduler_worker_stack_unittest.cc
index 520e52cd61f556ff52952fc63284d71ab162b2bf..b7d57ff1ef16623d7c0acb35e5af7e5efb7ae795 100644
--- a/base/task_scheduler/scheduler_worker_stack_unittest.cc
+++ b/base/task_scheduler/scheduler_worker_stack_unittest.cc
@@ -67,9 +67,9 @@ class TaskSchedulerWorkerStackTest : public testing::Test {
     worker_c_->JoinForTesting();
   }
 
-  std::unique_ptr<SchedulerWorker> worker_a_;
-  std::unique_ptr<SchedulerWorker> worker_b_;
-  std::unique_ptr<SchedulerWorker> worker_c_;
+  scoped_refptr<SchedulerWorker> worker_a_;
+  scoped_refptr<SchedulerWorker> worker_b_;
+  scoped_refptr<SchedulerWorker> worker_c_;
 
  private:
   TaskTracker task_tracker_;