bluetooth: readValue Blink implementation

Source/modules/bluetooth/BluetoothGATTCharacteristic.cpp

Index: Source/modules/bluetooth/BluetoothGATTCharacteristic.cpp
diff --git a/Source/modules/bluetooth/BluetoothGATTCharacteristic.cpp b/Source/modules/bluetooth/BluetoothGATTCharacteristic.cpp
index 35ecae79b130676c19680a0539ee8bb5b45cbb37..febc3ce2424ed8d5311b27a98d51ac3cd80d76dc 100644
--- a/Source/modules/bluetooth/BluetoothGATTCharacteristic.cpp
+++ b/Source/modules/bluetooth/BluetoothGATTCharacteristic.cpp
@@ -11,6 +11,7 @@
 #include "core/dom/DOMException.h"
 #include "core/dom/ExceptionCode.h"
 #include "modules/bluetooth/BluetoothError.h"
+#include "modules/bluetooth/ConvertWebVectorToArrayBuffer.h"
 #include "public/platform/Platform.h"
 #include "public/platform/modules/bluetooth/WebBluetooth.h"
 #include "wtf/OwnPtr.h"
@@ -35,4 +36,15 @@ void BluetoothGATTCharacteristic::dispose(WebBluetoothGATTCharacteristic* webCha
     delete webCharacteristic;
 }
 
+ScriptPromise BluetoothGATTCharacteristic::readValue(ScriptState* scriptState)
+{
+    WebBluetooth* webbluetooth = Platform::current()->bluetooth();
+
+    RefPtrWillBeRawPtr<ScriptPromiseResolver> resolver = ScriptPromiseResolver::create(scriptState);
+    ScriptPromise promise = resolver->promise();
+    webbluetooth->readValue(m_webCharacteristic->characteristicInstanceID, new CallbackPromiseAdapter<ConvertWebVectorToArrayBuffer, BluetoothError>(resolver));
+
+    return promise;
+}
+
 } // namespace blink