Fix bluetooth callback function declaration

device/bluetooth/bluetooth_low_energy_win.cc

 // Copyright 2014 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_low_energy_win.h"
 
 #include <memory>
 #include <utility>
 
 #include "base/files/file.h"
@@ skipping 818 matching lines @@
 
   return BluetoothGATTSetCharacteristicValue(file.GetPlatformFile(),
                                              characteristic, new_value, NULL,
                                              BLUETOOTH_GATT_FLAG_NONE);
 }
 
 HRESULT BluetoothLowEnergyWrapper::RegisterGattEvents(
     base::FilePath& service_path,
     BTH_LE_GATT_EVENT_TYPE event_type,
     PVOID event_parameter,
-    PFNBLUETOOTH_GATT_EVENT_CALLBACK callback,
+    PFNBLUETOOTH_GATT_EVENT_CALLBACK_CORRECTED callback,
     PVOID context,
     BLUETOOTH_GATT_EVENT_HANDLE* out_handle) {
   base::File file(service_path, base::File::FLAG_OPEN | base::File::FLAG_READ);
   if (!file.IsValid())
     return HRESULT_FROM_WIN32(ERROR_OPEN_FAILED);
-  return BluetoothGATTRegisterEvent(file.GetPlatformFile(), event_type,
-                                    event_parameter, callback, context,
-                                    out_handle, BLUETOOTH_GATT_FLAG_NONE);
+  // Cast to the official callback type for compatibility with the Windows
+  // 10.0.10586 definition, even though it is incorrect. This cast can be
+  // removed when we mandate building Chromium with the 10.0.14393 SDK or
+  // higher.
+  return BluetoothGATTRegisterEvent(
+      file.GetPlatformFile(), event_type, event_parameter,
+      reinterpret_cast<PFNBLUETOOTH_GATT_EVENT_CALLBACK>(callback), context,
+      out_handle, BLUETOOTH_GATT_FLAG_NONE);
 }
 
 HRESULT BluetoothLowEnergyWrapper::UnregisterGattEvent(
     BLUETOOTH_GATT_EVENT_HANDLE event_handle) {
   return BluetoothGATTUnregisterEvent(event_handle, BLUETOOTH_GATT_FLAG_NONE);
 }
 
 HRESULT BluetoothLowEnergyWrapper::WriteDescriptorValue(
     base::FilePath& service_path,
     const PBTH_LE_GATT_DESCRIPTOR descriptor,
     PBTH_LE_GATT_DESCRIPTOR_VALUE new_value) {
   base::File file(service_path, base::File::FLAG_OPEN | base::File::FLAG_READ |
                                     base::File::FLAG_WRITE);
   if (!file.IsValid())
     return HRESULT_FROM_WIN32(ERROR_OPEN_FAILED);
   return BluetoothGATTSetDescriptorValue(file.GetPlatformFile(), descriptor,
                                          new_value, BLUETOOTH_GATT_FLAG_NONE);
 }
 
 }  // namespace win
 }  // namespace device