Implement WebBluetooth descriptor.readValue()

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

 // 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.
 
 #ifndef BluetoothRemoteGATTDescriptor_h
 #define BluetoothRemoteGATTDescriptor_h
 
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "core/dom/DOMArrayPiece.h"
 #include "core/dom/DOMDataView.h"
@@ skipping 37 matching lines @@
   ScriptPromise writeValue(ScriptState*, const DOMArrayPiece&);
 
   // Interface required by garbage collection.
   DECLARE_VIRTUAL_TRACE();
 
  private:
   friend class DescriptorReadValueCallback;
 
   BluetoothRemoteGATTServer* getGatt() { return m_characteristic->getGatt(); }
 
+  void ReadValueCallback(ScriptPromiseResolver*,
+                         mojom::blink::WebBluetoothResult,
+                         const Optional<Vector<uint8_t>>&);
+
   mojom::blink::WebBluetoothRemoteGATTDescriptorPtr m_descriptor;
   Member<BluetoothRemoteGATTCharacteristic> m_characteristic;
   Member<DOMDataView> m_value;
 };
 
 }  // namespace blink
 
 #endif  // BluetoothRemoteGATTDescriptor_h