Check whether aria-expanded attribute is defined

Source/web/WebAXObject.cpp

Index: Source/web/WebAXObject.cpp
diff --git a/Source/web/WebAXObject.cpp b/Source/web/WebAXObject.cpp
index 5b55f1105b8e8863736dcd2ab0efe478a309cb9d..48e2a3a79907aa3cc4d67d8c90b9b0524ee95f28 100644
--- a/Source/web/WebAXObject.cpp
+++ b/Source/web/WebAXObject.cpp
@@ -274,14 +274,6 @@ bool WebAXObject::isEnabled() const
     return m_private->isEnabled();
 }
 
-bool WebAXObject::isExpanded() const
-{
-    if (isDetached())
-        return 0;
-
-    return m_private->isExpanded();
-}
-
 bool WebAXObject::isFocused() const
 {
     if (isDetached())
@@ -466,6 +458,14 @@ bool WebAXObject::ariaHasPopup() const
     return m_private->ariaHasPopup();
 }
 
+WebAXExpanded WebAXObject::ariaExpanded() const
+{
+    if (isDetached())
+        return WebAXExpandedUndefined;
+
+    return static_cast<WebAXExpanded>(m_private->ariaExpanded());
+}
+
 bool WebAXObject::ariaFlowTo(WebVector<WebAXObject>& flowToElements) const
 {
     if (isDetached())