device/bluetooth: Add abstract API definition for BluetoothGattDescriptor.

device/bluetooth/bluetooth_gatt_descriptor.cc

+// 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.
+
+#include "device/bluetooth/bluetooth_gatt_descriptor.h"
+
+#include "base/logging.h"
+
+namespace device {
+
+using bluetooth_utils::UUID;
+
+const UUID BluetoothGattDescriptor::
+    kCharacteristicExtendedPropertiesUuid("0x2900");
+const UUID BluetoothGattDescriptor::
+    kCharacteristicUserDescriptionUuid("0x2901");
+const UUID BluetoothGattDescriptor::
+    kClientCharacteristicConfigurationUuid("0x2902");
+const UUID BluetoothGattDescriptor::
+    kServerCharacteristicConfigurationUuid("0x2903");
+const UUID BluetoothGattDescriptor::
+    kCharacteristicPresentationFormatUuid("0x2904");
+const UUID BluetoothGattDescriptor::
+    kCharacteristicAggregateFormatUuid("0x2905");
+
+BluetoothGattDescriptor::BluetoothGattDescriptor() {
+}
+
+BluetoothGattDescriptor::~BluetoothGattDescriptor() {
+}
+
+// static
+BluetoothGattDescriptor* BluetoothGattDescriptor::Create(
+    const bluetooth_utils::UUID& uuid,
+    const std::vector<uint8>& value) {
+  LOG(ERROR) << "Creating local GATT characteristic descriptors currently not "
+             << "supported.";
+  return NULL;
+}
+
+}  // namespace device