Fix bluetooth callback function declaration

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 136 matching lines @@
     PVOID,
     std::unique_ptr<CharacteristicValueChangedRegistration>>
     CharacteristicValueChangedRegistrationMap;
 
 CharacteristicValueChangedRegistrationMap
     g_characteristic_value_changed_registrations;
 base::Lock g_characteristic_value_changed_registrations_lock;
 
 // Function to be registered to OS to monitor Bluetooth LE GATT event. It is
 // invoked in BluetoothApis.dll thread.
-void OnGetGattEventWin(BTH_LE_GATT_EVENT_TYPE type,
-                       PVOID event_parameter,
-                       PVOID context) {
+void CALLBACK OnGetGattEventWin(BTH_LE_GATT_EVENT_TYPE type,
+                                PVOID event_parameter,
+                                PVOID context) {
   if (type != CharacteristicValueChangedEvent) {
     // Right now, only characteristic value changed event is supported.
     NOTREACHED();
     return;
   }
 
   BLUETOOTH_GATT_VALUE_CHANGED_EVENT* event =
       (BLUETOOTH_GATT_VALUE_CHANGED_EVENT*)event_parameter;
   PBTH_LE_GATT_CHARACTERISTIC_VALUE new_value_win = event->CharacteristicValue;
   std::unique_ptr<std::vector<uint8_t>> new_value(
@@ skipping 864 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