[Webkit-unassigned] [Bug 171606] getOwnPropertyDescriptor on an indexed property for a typed array is wrong

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=171606

--- Comment #1 from Saam Barati <sbarati at apple.com> ---
I think the fix is trivial:
```
template<typename Adaptor>
bool JSGenericTypedArrayView<Adaptor>::getOwnPropertySlot(
    JSObject* object, ExecState* exec, PropertyName propertyName, PropertySlot& slot)
{
    JSGenericTypedArrayView* thisObject = jsCast<JSGenericTypedArrayView*>(object);

    if (std::optional<uint32_t> index = parseIndex(propertyName)) {
        if (thisObject->isNeutered()) {
            slot.setCustom(thisObject, None, throwNeuteredTypedArrayTypeError);
            return true;
        }

        if (thisObject->canGetIndexQuickly(index.value()))
            slot.setValue(thisObject, DontDelete | ReadOnly, thisObject->getIndexQuickly(index.value()));
        else
            slot.setValue(thisObject, DontDelete | ReadOnly, jsUndefined());
        return true;
    }

    return Base::getOwnPropertySlot(thisObject, exec, propertyName, slot);
}
```
should not say ReadOnly.

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