Chromium side Implementation to expose aria properties - setsize & posinset

content/renderer/accessibility/blink_ax_tree_source.cc

Index: content/renderer/accessibility/blink_ax_tree_source.cc
diff --git a/content/renderer/accessibility/blink_ax_tree_source.cc b/content/renderer/accessibility/blink_ax_tree_source.cc
index 78ea801b189e79df33b96c32592970c470eb9452..a53441a2251eacb3d7c4d85a8960fb998a8e6335 100644
--- a/content/renderer/accessibility/blink_ax_tree_source.cc
+++ b/content/renderer/accessibility/blink_ax_tree_source.cc
@@ -327,6 +327,12 @@ void BlinkAXTreeSource::SerializeNode(blink::WebAXObject src,
                          src.hierarchicalLevel());
   }
 
+  if (src.ariaSetSize() > 0)
+    dst->AddIntAttribute(ui::AX_ATTR_SET_SIZE, src.ariaSetSize());
+
+  if (src.ariaPosInSet() > 0)
+    dst->AddIntAttribute(ui::AX_ATTR_POS_IN_SET, src.ariaPosInSet());
+
   // Treat the active list box item as focused.
   if (dst->role == ui::AX_ROLE_LIST_BOX_OPTION &&
       src.isSelectedOptionActive()) {