Function js::jsapi::JS_ExecuteScript2

pub unsafe extern "C" fn JS_ExecuteScript2(
    cx: *mut JSContext, 
    scopeChain: *mut AutoObjectVector, 
    script: HandleScript, 
    rval: MutableHandleValue
) -> bool

As above, but providing an explicit scope chain. scopeChain must not include the global object on it; that's implicit. It needs to contain the other objects that should end up on the script's scope chain.