Implement WebBluetooth getDescriptor[s]

third_party/WebKit/Source/modules/bluetooth/BluetoothRemoteGATTDescriptor.idl

Index: third_party/WebKit/Source/modules/bluetooth/BluetoothRemoteGATTDescriptor.idl
diff --git a/third_party/WebKit/Source/modules/bluetooth/BluetoothRemoteGATTDescriptor.idl b/third_party/WebKit/Source/modules/bluetooth/BluetoothRemoteGATTDescriptor.idl
new file mode 100644
index 0000000000000000000000000000000000000000..070b7db5d3d6806923ae5f6f0c7509f61aba329c
--- /dev/null
+++ b/third_party/WebKit/Source/modules/bluetooth/BluetoothRemoteGATTDescriptor.idl
@@ -0,0 +1,18 @@
+// Copyright 2016 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.
+
+// https://webbluetoothcg.github.io/web-bluetooth/#bluetoothremotegattdescriptor
+
+// Implement BluetoothRemoteGATTDescriptor interface: https://crbug.com/660699
+
+[
+    RuntimeEnabled=WebBluetooth,
+] interface BluetoothRemoteGATTDescriptor  {
+
+    readonly attribute BluetoothRemoteGATTCharacteristic characteristic;
+    readonly attribute UUID                              uuid;
+    readonly attribute DataView?                         value;
+    [CallWith=ScriptState] Promise<DataView>             readValue();
+    [CallWith=ScriptState] Promise<void>                 writeValue(BufferSource value);
+};