Implement WebBluetooth descriptor.readValue()

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

Index: third_party/WebKit/Source/modules/bluetooth/BluetoothRemoteGATTUtils.cpp
diff --git a/third_party/WebKit/Source/modules/bluetooth/BluetoothRemoteGATTUtils.cpp b/third_party/WebKit/Source/modules/bluetooth/BluetoothRemoteGATTUtils.cpp
index 7e586e6e56b0fbadaf3b7b51d90e7f450f60cfa0..f41787190932056cd20e7af05e2d2314d00c13be 100644
--- a/third_party/WebKit/Source/modules/bluetooth/BluetoothRemoteGATTUtils.cpp
+++ b/third_party/WebKit/Source/modules/bluetooth/BluetoothRemoteGATTUtils.cpp
@@ -35,6 +35,12 @@ DOMException* BluetoothRemoteGATTUtils::CreateDOMException(ExceptionType type) {
           "Characteristic is no longer valid. Remember to retrieve the "
           "characteristic again after reconnecting.");
 
+    case ExceptionType::kInvalidDescriptor:
+      return DOMException::create(
+          InvalidStateError,
+          "Descriptor is no longer valid. Remember to retrieve the "
+          "Descriptor again after reconnecting.");
+
     default:
       NOTREACHED();
       return nullptr;