Need to define an actual processing model for what things are added to resource timing and for what global

[bzbarsky]

Some examples that are completely undefined right now, as far as I can tell:

1. If an iframe is navigated via changing the src attribute, does that load get added to resource timing? For which page?

2. If an iframe is navigated via setting its location.href, same questions.

3. If an iframe is navigated via meta refresh, same questions.

Similar questions for an <object> or <embed>, with the additional complication that for those you don't know up front whether the load is a navigation or not.