HTML-AAM: Unnamed <section> should map as <div>, not unconditionally as role="region"

[klown]

Raising this issue based on comments by myself, @joanmarie, @mcking65, and @matatk from w3c/aria#513.

There, the mapping of ARIA role="region" is conditional on the element having an accessible name. If not, the AAPI role reverts on the native role of the element.

The HTML-AAM unconditionally maps <section> to region, except in the case of UIA. The suggestion in w3c/aria#513 is to map unnamed <section> as if it was a <div>.

Heads up to @richschwer, since you are reviewing the HTML-AAM.

[jasonkiss]

@stevefaulkner, @joanmarie, @klown As per the commit above, see revised mappings for section.

Will merge branch if you're happy.

[klown]

@jasonkiss Looks good to me.

[richschwer]

Please merge this branch. We are writing the test harness and need this to be merged.

[jasonkiss]

Merged. 2d740ef