[orca] Display alternative text for cell indices

[Joanmarie Diggs <joanied src gnome org>]

commit fb2e35418239659006d1eb345bd9a7f1cc5f596c
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Wed Jun 5 20:18:39 2019 -0400

    Display alternative text for cell indices

 src/orca/scripts/web/braille_generator.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)
---
diff --git a/src/orca/scripts/web/braille_generator.py b/src/orca/scripts/web/braille_generator.py
index bde861570..51840782f 100644
--- a/src/orca/scripts/web/braille_generator.py
+++ b/src/orca/scripts/web/braille_generator.py
@@ -89,7 +89,11 @@ class BrailleGenerator(braille_generator.BrailleGenerator):
                 result.append(messages.IMAGE_MAP_LINK)
 
         elif role not in doNotDisplay:
-            result = super()._generateRoleName(obj, **args)
+            label = self._script.utilities.labelForCellCoordinates(obj)
+            if label:
+                result.append(label)
+            else:
+                result = super()._generateRoleName(obj, **args)
 
         index = args.get('index', 0)
         total = args.get('total', 1)