The ARIA spec defines the radiogroup role as "A group of radio controls." It will probably map to RadioGroupRole.
Created attachment 33984 [details]
Comment on attachment 33984 [details]
> + AccessibilityObject* radioButton = m_object->selectedRadioButton();
> + if (radioButton)
> + return radioButton->wrapper();
> + return nil;
We normally do the early exit for the failure case rather than the success case.
not sure why a layout test in mozilla/tables is failing for intel release after this patch.