Implement WebBluetooth descriptor.readValue()

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

Index: third_party/WebKit/Source/modules/bluetooth/BluetoothRemoteGATTDescriptor.h
diff --git a/third_party/WebKit/Source/modules/bluetooth/BluetoothRemoteGATTDescriptor.h b/third_party/WebKit/Source/modules/bluetooth/BluetoothRemoteGATTDescriptor.h
index 6a2fc29b1857d5198a7e4a714c80e6d60980b003..709131730a81fddebba36b23ba1b37585cd8895d 100644
--- a/third_party/WebKit/Source/modules/bluetooth/BluetoothRemoteGATTDescriptor.h
+++ b/third_party/WebKit/Source/modules/bluetooth/BluetoothRemoteGATTDescriptor.h
@@ -47,6 +47,9 @@ class BluetoothRemoteGATTDescriptor final
   ScriptPromise readValue(ScriptState*);
   ScriptPromise writeValue(ScriptState*, const DOMArrayPiece&);
 
+  // Save value.
+  void setValue(DOMDataView*);
+
   // Interface required by garbage collection.
   DECLARE_VIRTUAL_TRACE();
 
@@ -55,6 +58,10 @@ class BluetoothRemoteGATTDescriptor final
 
   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;