Implement BluetoothRemoteGattCharacteristicWin::StartNotifySession and related unit tests

device/bluetooth/bluetooth_remote_gatt_descriptor_win.h

 // 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.
 
 #ifndef DEVICE_BLUETOOTH_BLUETOOTH_REMOTE_GATT_DESCRIPTOR_WIN_H_
 #define DEVICE_BLUETOOTH_BLUETOOTH_REMOTE_GATT_DESCRIPTOR_WIN_H_
 
 #include "base/files/file_path.h"
 #include "base/memory/weak_ptr.h"
 #include "device/bluetooth/bluetooth_gatt_descriptor.h"
@@ skipping 21 matching lines @@
   std::vector<uint8_t>& GetValue() const override;
   BluetoothGattCharacteristic* GetCharacteristic() const override;
   BluetoothGattCharacteristic::Permissions GetPermissions() const override;
   void ReadRemoteDescriptor(const ValueCallback& callback,
                             const ErrorCallback& error_callback) override;
   void WriteRemoteDescriptor(const std::vector<uint8_t>& new_value,
                              const base::Closure& callback,
                              const ErrorCallback& error_callback) override;
 
   uint16_t GetAttributeHandle() const;
+  PBTH_LE_GATT_DESCRIPTOR GetWinDescriptorInfo() const {
+    return descriptor_info_.get();
+  }
 
  private:
   BluetoothRemoteGattCharacteristicWin* parent_characteristic_;
   scoped_ptr<BTH_LE_GATT_DESCRIPTOR> descriptor_info_;
   scoped_refptr<base::SequencedTaskRunner> ui_task_runner_;
 
   base::FilePath service_path_;
   scoped_refptr<BluetoothTaskManagerWin> task_manager_;
   BluetoothGattCharacteristic::Permissions descriptor_permissions_;
   BluetoothUUID descriptor_uuid_;
   std::string descriptor_identifier_;
   std::vector<uint8_t> descriptor_value_;
 
   base::WeakPtrFactory<BluetoothRemoteGattDescriptorWin> weak_ptr_factory_;
   DISALLOW_COPY_AND_ASSIGN(BluetoothRemoteGattDescriptorWin);
 };
 
 }  // namespace device.
 #endif  // DEVICE_BLUETOOTH_BLUETOOTH_REMOTE_GATT_DESCRIPTOR_WIN_H_