Add TaskPriority as a parameter to SequencedWorkerPool in preparation for TaskScheduler experiment.

device/bluetooth/bluetooth_task_manager_win.cc

 // Copyright (c) 2012 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 "device/bluetooth/bluetooth_task_manager_win.h"
 
 #include <stddef.h>
 #include <winsock2.h>
 
 #include <memory>
@@ skipping 239 matching lines @@
 }
 
 void BluetoothTaskManagerWin::RemoveObserver(Observer* observer) {
   DCHECK(observer);
   DCHECK(ui_task_runner_->RunsTasksOnCurrentThread());
   observers_.RemoveObserver(observer);
 }
 
 void BluetoothTaskManagerWin::Initialize() {
   DCHECK(ui_task_runner_->RunsTasksOnCurrentThread());
-  worker_pool_ = new base::SequencedWorkerPool(kNumThreadsInWorkerPool,
-                                               kBluetoothThreadName);
+  worker_pool_ = new base::SequencedWorkerPool(
+      kNumThreadsInWorkerPool, kBluetoothThreadName,
+      base::TaskPriority::USER_VISIBLE);
   InitializeWithBluetoothTaskRunner(
       worker_pool_->GetSequencedTaskRunnerWithShutdownBehavior(
           worker_pool_->GetSequenceToken(),
           base::SequencedWorkerPool::CONTINUE_ON_SHUTDOWN));
 }
 
 void BluetoothTaskManagerWin::InitializeWithBluetoothTaskRunner(
     scoped_refptr<base::SequencedTaskRunner> bluetooth_task_runner) {
   DCHECK(ui_task_runner_->RunsTasksOnCurrentThread());
   bluetooth_task_runner_ = bluetooth_task_runner;
@@ skipping 761 matching lines @@
 void BluetoothTaskManagerWin::PostUnregisterGattCharacteristicValueChangedEvent(
     PVOID event_handle) {
   DCHECK(ui_task_runner_->RunsTasksOnCurrentThread());
   bluetooth_task_runner_->PostTask(
       FROM_HERE, base::Bind(&BluetoothTaskManagerWin::
                                 UnregisterGattCharacteristicValueChangedEvent,
                             this, event_handle));
 }
 
 }  // namespace device