Bug 1563598: Change output elements to have statusbar role instead of section role. r=Jamie

Differential Revision: https://phabricator.services.mozilla.com/D45402

--HG--
extra : moz-landing-system : lando

accessible/base/MarkupMap.h

@@ -395,7 +395,7 @@ MARKUPMAP(
     [](Element* aElement, Accessible* aContext) -> Accessible* {
       return new HTMLOutputAccessible(aElement, aContext->Document());
     },
-    roles::SECTION, Attr(live, polite))
+    roles::STATUSBAR, Attr(live, polite))
 
 MARKUPMAP(p, nullptr, roles::PARAGRAPH)
 

accessible/tests/mochitest/elm/test_HTMLSpec.html

@@ -192,7 +192,7 @@
         role: ROLE_PARAGRAPH,
         children: [
           { role: ROLE_WHITESPACE },
-          { role: ROLE_WHITESPACE } 
+          { role: ROLE_WHITESPACE }
         ]
       };
       testElm("br_container", obj);
@@ -1143,7 +1143,7 @@
       // HTML:output
 
       obj = {
-        role: ROLE_SECTION,
+        role: ROLE_STATUSBAR,
         attributes: { "live": "polite" },
         todo_relations: {
           RELATION_CONTROLLED_BY: "output_input",