[orca] Don't treat iframes as inline unless they are contained in a document

[Joanmarie Diggs <joanied src gnome org>]

commit 6a3d62200ffe465513dafe04542148303e3b40e0
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Tue Feb 11 15:19:25 2020 +0100

    Don't treat iframes as inline unless they are contained in a document
    
    Some apps (e.g. Thunderbird) report the top-level iframe as being inline.
    We only care about the inline nature of iframes when they are contained
    in a document (e.g. the Facebook like plugin)

 src/orca/scripts/web/script_utilities.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
---
diff --git a/src/orca/scripts/web/script_utilities.py b/src/orca/scripts/web/script_utilities.py
index 937b12d7e..6c53f6202 100644
--- a/src/orca/scripts/web/script_utilities.py
+++ b/src/orca/scripts/web/script_utilities.py
@@ -2110,7 +2110,10 @@ class Utilities(script_utilities.Utilities):
             return False
 
         displayStyle = self._getDisplayStyle(obj)
-        return "inline" in displayStyle
+        if "inline" not in displayStyle:
+            return False
+
+        return self.documentForObject(obj) is not None
 
     def isInlineIframeDescendant(self, obj):
         if not obj: