Add Lazy Creation and Thread Detachment Support in the Scheduler Worker Pool

base/task_scheduler/scheduler_service_thread_unittest.cc

 // 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.
 
 #include "base/task_scheduler/scheduler_service_thread.h"
 
 #include <memory>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 38 matching lines @@
 //    delay durations should be reasonably short on the order of hundreds of
 //    milliseconds.
 class TaskSchedulerServiceThreadTest : public testing::Test {
  protected:
   TaskSchedulerServiceThreadTest() : delayed_task_manager_(Bind(&DoNothing)) {}
 
   void SetUp() override {
     scheduler_worker_pool_ = SchedulerWorkerPoolImpl::Create(
         "TestWorkerPoolForSchedulerServiceThread", ThreadPriority::BACKGROUND,
         1u, SchedulerWorkerPoolImpl::IORestriction::DISALLOWED,
-        Bind(&ReEnqueueSequenceCallback), &task_tracker_,
+        TimeDelta::Max(), Bind(&ReEnqueueSequenceCallback), &task_tracker_,
         &delayed_task_manager_);
     ASSERT_TRUE(scheduler_worker_pool_);
     service_thread_ = SchedulerServiceThread::Create(
         &task_tracker_, &delayed_task_manager_);
     ASSERT_TRUE(service_thread_);
   }
 
   void TearDown() override {
     scheduler_worker_pool_->JoinForTesting();
     service_thread_->JoinForTesting();
@@ skipping 104 matching lines @@
 
   // Now wait for the second task to be fired.
   event2.Wait();
 
   // Which should only have fired after |delay2| was expired.
   EXPECT_GE(TimeTicks::Now() - test_begin_time, delay2);
 }
 
 }  // namespace internal
 }  // namespace base