Add Thread Standby Policy SchedulerWorkerPoolImpl

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 178133daf6e7cedae0a0c01a7b64036d2341dbba..8014030b541b6e6d4e5face52c20b02ca8856b9c 100644
--- a/base/task_scheduler/scheduler_worker_pool_impl.h
+++ b/base/task_scheduler/scheduler_worker_pool_impl.h
@@ -106,6 +106,10 @@ class BASE_EXPORT SchedulerWorkerPoolImpl : public SchedulerWorkerPool {
   // reclaimed).
   void DisallowWorkerDetachmentForTesting();
 
+  // Returns the number of workers alive in this worker pool. The value may
+  // change if workers are woken up or detached during this call.
+  size_t NumberOfAliveWorkersForTesting();
+
  private:
   class SchedulerSingleThreadTaskRunner;
   class SchedulerWorkerDelegateImpl;
@@ -119,6 +123,7 @@ class BASE_EXPORT SchedulerWorkerPoolImpl : public SchedulerWorkerPool {
 
   bool Initialize(
       ThreadPriority priority_hint,
+      SchedulerWorkerPoolParams::StandbyThreadPolicy standby_thread_policy,
       size_t max_threads,
       const ReEnqueueSequenceCallback& re_enqueue_sequence_callback);