Only enumerate own properties in value-mirror.cc

We previously enumberated properties and then restricted them
to real named properties. This CL changes it to only enumerate
own properties in the first place.

Bug: chromium:1213393
Change-Id: I8665a19a9beccae3bef99106924b65fb219d48ca
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2953284Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75094}

src/inspector/value-mirror.cc

@@ -50,7 +50,7 @@ Response objectToProtocolValue(
   std::unique_ptr<protocol::DictionaryValue> jsonObject =
       protocol::DictionaryValue::create();
   v8::Local<v8::Array> propertyNames;
-  if (!object->GetPropertyNames(context).ToLocal(&propertyNames))
+  if (!object->GetOwnPropertyNames(context).ToLocal(&propertyNames))
     return Response::InternalError();
   uint32_t length = propertyNames->Length();
   for (uint32_t i = 0; i < length; i++) {