Implement WebBluetooth descriptor.readValue()

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

 // Copyright 2017 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 BluetoothRemoteGATTUtils_h
 #define BluetoothRemoteGATTUtils_h
 
 #include "core/dom/DOMDataView.h"
 #include "core/dom/DOMException.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
 class BluetoothRemoteGATTUtils final {
  public:
   static DOMDataView* ConvertWTFVectorToDataView(const WTF::Vector<uint8_t>&);
 
   enum ExceptionType {
     kGATTServerDisconnected,
     kGATTServerNotConnected,
-    kInvalidCharacteristic
+    kInvalidCharacteristic,
+    kInvalidDescriptor
   };
 
   static DOMException* CreateDOMException(ExceptionType);
 };
 
 }  // namespace blink
 
 #endif  // BluetoothRemoteGATTUtils_h