Bluetooth class changes for implementing local GATT attributes.

device/bluetooth/dbus/fake_bluetooth_gatt_descriptor_client.cc

Index: device/bluetooth/dbus/fake_bluetooth_gatt_descriptor_client.cc
diff --git a/device/bluetooth/dbus/fake_bluetooth_gatt_descriptor_client.cc b/device/bluetooth/dbus/fake_bluetooth_gatt_descriptor_client.cc
index c0dfc3b752c565f7d0f92ef4163a55cc4dbb5d21..434e97ff9b49a6d12ed29f326d49e5b0d8db083e 100644
--- a/device/bluetooth/dbus/fake_bluetooth_gatt_descriptor_client.cc
+++ b/device/bluetooth/dbus/fake_bluetooth_gatt_descriptor_client.cc
@@ -130,7 +130,7 @@ void FakeBluetoothGattDescriptorClient::WriteValue(
 
   // Since the only fake descriptor is "Client Characteristic Configuration"
   // and BlueZ doesn't allow writing to it, return failure.
-  error_callback.Run("org.bluez.Error.NotPermitted",
+  error_callback.Run(bluetooth_gatt_service::kErrorWriteNotPermitted,
                      "Writing to the Client Characteristic Configuration "
                      "descriptor not allowed");
 }