Implement BluetoothGattNotifySession::Stop on Android, 2nd attempt

device/bluetooth/bluetooth_gatt_notify_session_android.h

-// 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.
-
-#ifndef DEVICE_BLUETOOTH_BLUETOOTH_GATT_NOTIFY_SESSION_ANDROID_H_
-#define DEVICE_BLUETOOTH_BLUETOOTH_GATT_NOTIFY_SESSION_ANDROID_H_
-
-#include <string>
-
-#include "base/callback.h"
-#include "base/macros.h"
-#include "device/bluetooth/bluetooth_gatt_notify_session.h"
-
-namespace device {
-
-class BluetoothAdapter;
-class BluetoothRemoteGattCharacteristicAndroid;
-
-// BluetoothGattNotifySessionAndroid implements
-// BluetoothGattNotifySession for the Android platform.
-//
-// TODO(crbug.com/551634): Detect destroyed Characteristic or parents objects.
-// TODO(crbug.com/551634): Implement Stop.
-class DEVICE_BLUETOOTH_EXPORT BluetoothGattNotifySessionAndroid
-    : public device::BluetoothGattNotifySession {
- public:
-  explicit BluetoothGattNotifySessionAndroid(
-      const std::string& characteristic_identifier);
-  ~BluetoothGattNotifySessionAndroid() override;
-
-  // BluetoothGattNotifySession overrides.
-  std::string GetCharacteristicIdentifier() const override;
-  bool IsActive() override;
-  void Stop(const base::Closure& callback) override;
-
- private:
-  // Identifier of the associated characteristic.
-  std::string characteristic_id_;
-
-  DISALLOW_COPY_AND_ASSIGN(BluetoothGattNotifySessionAndroid);
-};
-
-}  // namespace device
-
-#endif  //  DEVICE_BLUETOOTH_BLUETOOTH_GATT_NOTIFY_SESSION_ANDROID_H_