Implement BluetoothRemoteGattCharacteristicWin::GetDescriptors

device/bluetooth/bluetooth_adapter_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_adapter_win.h"
 
 #include <string>
 #include <utility>
 
 #include "base/location.h"
@@ skipping 328 matching lines @@
   task_manager_ =
       new BluetoothTaskManagerWin(ui_task_runner_);
   task_manager_->AddObserver(this);
   task_manager_->Initialize();
 }
 
 void BluetoothAdapterWin::InitForTest(
     scoped_refptr<base::SequencedTaskRunner> ui_task_runner,
     scoped_refptr<base::SequencedTaskRunner> bluetooth_task_runner) {
   ui_task_runner_ = ui_task_runner;
+  if (ui_task_runner_ == nullptr)
+    ui_task_runner_ = base::ThreadTaskRunnerHandle::Get();
   task_manager_ =
       new BluetoothTaskManagerWin(ui_task_runner_);
   task_manager_->AddObserver(this);
   task_manager_->InitializeWithBluetoothTaskRunner(bluetooth_task_runner);
 }
 
 void BluetoothAdapterWin::MaybePostStartDiscoveryTask() {
   if (discovery_status_ == NOT_DISCOVERING &&
       !on_start_discovery_callbacks_.empty()) {
     discovery_status_ = DISCOVERY_STARTING;
@@ skipping 15 matching lines @@
     num_discovery_listeners_ -= on_stop_discovery_callbacks_.size();
     on_stop_discovery_callbacks_.clear();
     return;
   }
 
   discovery_status_ = DISCOVERY_STOPPING;
   task_manager_->PostStopDiscoveryTask();
 }
 
 }  // namespace device