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diff --git a/device/bluetooth/bluetooth_gatt_notify_session_chromeos.h b/device/bluetooth/bluetooth_gatt_notify_session_chromeos.h
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+++ b/device/bluetooth/bluetooth_gatt_notify_session_chromeos.h
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+// 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_CHROMEOS_H_
+#define DEVICE_BLUETOOTH_BLUETOOTH_GATT_NOTIFY_SESSION_CHROMEOS_H_
+
+#include <string>
+
+#include "base/callback.h"
+#include "device/bluetooth/bluetooth_gatt_notify_session.h"
+#include "device/bluetooth/dbus/bluetooth_gatt_characteristic_client.h"
+
+namespace device {
+
+class BluetoothAdapter;
+
+}  // namespace device
+
+namespace chromeos {
+
+class BluetoothRemoteGattCharacteristicChromeOS;
+
+// BluetoothGattNotifySessionChromeOS implements
+// BluetoothGattNotifySession for the Chrome OS platform.
+class BluetoothGattNotifySessionChromeOS
+    : public device::BluetoothGattNotifySession,
+      public bluez::BluetoothGattCharacteristicClient::Observer {
+ public:
+  ~BluetoothGattNotifySessionChromeOS() override;
+
+  // BluetoothGattNotifySession overrides.
+  std::string GetCharacteristicIdentifier() const override;
+  bool IsActive() override;
+  void Stop(const base::Closure& callback) override;
+
+ private:
+  friend class BluetoothRemoteGattCharacteristicChromeOS;
+
+  explicit BluetoothGattNotifySessionChromeOS(
+      scoped_refptr<device::BluetoothAdapter> adapter,
+      const std::string& device_address,
+      const std::string& service_identifier,
+      const std::string& characteristic_identifier,
+      const dbus::ObjectPath& characteristic_path);
+
+  // bluez::BluetoothGattCharacteristicClient::Observer overrides.
+  void GattCharacteristicRemoved(const dbus::ObjectPath& object_path) override;
+  void GattCharacteristicPropertyChanged(
+      const dbus::ObjectPath& object_path,
+      const std::string& property_name) override;
+
+  // True, if this session is currently active.
+  bool active_;
+
+  // The Bluetooth adapter that this session is associated with.
+  scoped_refptr<device::BluetoothAdapter> adapter_;
+
+  // The Bluetooth address of the device hosting the characteristic.
+  std::string device_address_;
+
+  // The GATT service that the characteristic belongs to.
+  std::string service_id_;
+
+  // Identifier of the associated characteristic.
+  std::string characteristic_id_;
+
+  // D-Bus object path of the associated characteristic. This is used to filter
+  // observer events.
+  dbus::ObjectPath object_path_;
+
+  DISALLOW_COPY_AND_ASSIGN(BluetoothGattNotifySessionChromeOS);
+};
+
+}  // namespace chromeos
+
+#endif  //  DEVICE_BLUETOOTH_BLUETOOTH_GATT_NOTIFY_SESSION_CHROMEOS_H_