[orca] Handle Gecko-specific text attribute name for misspelled

[Joanmarie Diggs <joanied src gnome org>]

commit c2fbf513fd2ea491a04c97520631ddc9991e4d65
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Mon Aug 17 18:23:05 2015 -0400

    Handle Gecko-specific text attribute name for misspelled

 src/orca/scripts/toolkits/Gecko/script.py |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/src/orca/scripts/toolkits/Gecko/script.py b/src/orca/scripts/toolkits/Gecko/script.py
index 2ce9b69..b50a051 100644
--- a/src/orca/scripts/toolkits/Gecko/script.py
+++ b/src/orca/scripts/toolkits/Gecko/script.py
@@ -47,6 +47,9 @@ class Script(web.Script):
             "background-color"        : "bg-color",
             "color"                   : "fg-color"}
 
+        # This one needs some more consideration for all toolkits.
+        self.attributeNamesDict["invalid"] = "text-spelling"
+
     def getUtilities(self):
         """Returns the utilites for this script."""