SchedulerWorker Refcounting for Destruction in Production

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 127 matching lines @@
   void RemoveFromIdleWorkersStack(SchedulerWorker* worker);
 
   // Returns true if worker thread detachment is permitted.
   bool CanWorkerDetachForTesting();
 
   // The name of this worker pool, used to label its worker threads.
   const std::string name_;
 
   // All worker owned by this worker pool. Only modified during initialization
   // of the worker pool.
-  std::vector<std::unique_ptr<SchedulerWorker>> workers_;
+  std::vector<scoped_refptr<SchedulerWorker>> workers_;
 
   // 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_;
@@ skipping 45 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_