Implement DBus changes needed for notifications.

device/bluetooth/dbus/fake_bluetooth_gatt_characteristic_service_provider.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_DBUS_FAKE_BLUETOOTH_GATT_CHARACTERISTIC_SERVICE_PROVIDER_H_
 #define DEVICE_BLUETOOTH_DBUS_FAKE_BLUETOOTH_GATT_CHARACTERISTIC_SERVICE_PROVIDER_H_
 
 #include <stdint.h>
 #include <string>
 #include <vector>
@@ skipping 32 matching lines @@
       const device::BluetoothLocalGattService::Delegate::ValueCallback&
           callback,
       const device::BluetoothLocalGattService::Delegate::ErrorCallback&
           error_callback);
   void SetValue(
       const std::vector<uint8_t>& value,
       const base::Closure& callback,
       const device::BluetoothLocalGattService::Delegate::ErrorCallback&
           error_callback);
 
+  // Method to simulate starting and stopping notifications.
+  bool NotificationsChange(bool start);
+
   const dbus::ObjectPath& object_path() const override;
   const std::string& uuid() const { return uuid_; }
   const dbus::ObjectPath& service_path() const { return service_path_; }
+  const std::vector<uint8_t>& sent_value() const { return sent_value_; }
 
  private:
   // D-Bus object path of the fake GATT characteristic.
   dbus::ObjectPath object_path_;
 
   // 128-bit GATT characteristic UUID.
   const std::string uuid_;
 
   // Properties for this characteristic.
   const std::vector<std::string> flags_;
 
   // Object path of the service that this characteristic belongs to.
   const dbus::ObjectPath service_path_;
 
+  // Value that was sent to the fake remote device.
+  std::vector<uint8_t> sent_value_;
+
   // The delegate that method calls are passed on to.
   std::unique_ptr<BluetoothGattAttributeValueDelegate> delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeBluetoothGattCharacteristicServiceProvider);
 };
 
 }  // namespace bluez
 
 #endif  // DEVICE_BLUETOOTH_DBUS_FAKE_BLUETOOTH_GATT_CHARACTERISTIC_SERVICE_PROVIDER_H_