Introduce new API ariaAutoComplete() to expose correct state and object attribute.

Source/modules/accessibility/AXNodeObject.cpp

 /*
 * Copyright (C) 2012, Google 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 932 matching lines @@
         AccessibilityRole parentRole = parent->roleValue();
         if (parentRole == GroupRole)
             level++;
         else if (parentRole == TreeRole)
             break;
     }
 
     return level;
 }
 
+String AXNodeObject::ariaAutoComplete() const
+{
+    const AtomicString& ariaAutoComplete = getAttribute(aria_autocompleteAttr);
+
+    if (roleValue() == ComboBoxRole || roleValue() == TextAreaRole)

[dmazzoni, 2014/12/09 16:19:35]

This test should come first so we don't need to call getAttribute only to throw
it away.

if (roleValue() != ComboBoxRole && roleValue() != TextAreaRole)
    return String();

Also, it's optional whether you want to have this return an enum or not, but I
think you should filter this to only valid attribute values.

I.e. if the value is "list", "inline", or "both", return the string - otherwise
return the empty string.

No need to return "none", since that's the same as no aria-autocomplete.

+        return ariaAutoComplete;
+
+    return String();
+}
+
 String AXNodeObject::text() const
 {
     // If this is a user defined static text, use the accessible name computation.
     if (ariaRoleAttribute() == StaticTextRole)
         return ariaAccessibilityDescription();
 
     if (!isTextControl())
         return String();
 
     Node* node = this->node();
@@ skipping 873 matching lines @@
     float range = maxValueForRange() - minValueForRange();
     float value = valueForRange();
 
     value += range * (percentChange / 100);
     setValue(String::number(value));
 
     axObjectCache()->postNotification(node(), AXObjectCacheImpl::AXValueChanged, true);
 }
 
 } // namespace blink