Selection follows focus/activedescendant in single selection containers

third_party/WebKit/Source/modules/accessibility/AXListBoxOption.cpp

 /*
  * Copyright (C) 2008 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 98 matching lines @@
     IgnoredReasons* ignored_reasons) const {
   if (!GetNode())
     return true;
 
   if (AccessibilityIsIgnoredByDefault(ignored_reasons))
     return true;
 
   return false;
 }
 
+bool AXListBoxOption::CanSetFocusAttribute() const {
+  return CanSetSelectedAttribute();
+}
+
 bool AXListBoxOption::CanSetSelectedAttribute() const {
   if (!isHTMLOptionElement(GetNode()))
     return false;
 
   if (toHTMLOptionElement(GetNode())->IsDisabledFormControl())
     return false;
 
   HTMLSelectElement* select_element = ListBoxOptionParentNode();
-  if (select_element && select_element->IsDisabledFormControl())
+  if (!select_element || select_element->IsDisabledFormControl())
     return false;
 
-  return true;
+  return IsEnabled();
 }
 
 String AXListBoxOption::TextAlternative(bool recursive,
                                         bool in_aria_labelled_by_traversal,
                                         AXObjectSet& visited,
                                         AXNameFrom& name_from,
                                         AXRelatedObjectVector* related_objects,
                                         NameSources* name_sources) const {
   // If nameSources is non-null, relatedObjects is used in filling it in, so it
   // must be non-null as well.
@@ skipping 41 matching lines @@
   if (!GetNode())
     return 0;
 
   if (isHTMLOptionElement(GetNode()))
     return toHTMLOptionElement(GetNode())->OwnerSelectElement();
 
   return 0;
 }
 
 }  // namespace blink