chromeos/dbus: Update Bluetooth GATT API clients to upstream definition

chromeos/dbus/bluetooth_gatt_descriptor_client.cc

Index: chromeos/dbus/bluetooth_gatt_descriptor_client.cc
diff --git a/chromeos/dbus/bluetooth_gatt_descriptor_client.cc b/chromeos/dbus/bluetooth_gatt_descriptor_client.cc
index bb8c3f8e0b869b947bdc7bf008354f6a5ad4ba56..65bba572695406213e6bf2e3c4ee4380ec229590 100644
--- a/chromeos/dbus/bluetooth_gatt_descriptor_client.cc
+++ b/chromeos/dbus/bluetooth_gatt_descriptor_client.cc
@@ -13,6 +13,13 @@
 
 namespace chromeos {
 
+namespace {
+
+// TODO(armansito): Move this constant to cros_system_api.
+const char kValueProperty[] = "Value";
+
+}  // namespace
+
 // static
 const char BluetoothGattDescriptorClient::kNoResponseError[] =
     "org.chromium.Error.NoResponse";
@@ -28,6 +35,7 @@ BluetoothGattDescriptorClient::Properties::Properties(
   RegisterProperty(bluetooth_gatt_descriptor::kUUIDProperty, &uuid);
   RegisterProperty(bluetooth_gatt_descriptor::kCharacteristicProperty,
                    &characteristic);
+  RegisterProperty(kValueProperty, &value);
 }
 
 BluetoothGattDescriptorClient::Properties::~Properties() {