Clean up accessibility enums for use in Chromium.

Source/web/WebAccessibilityObject.cpp

Index: Source/web/WebAccessibilityObject.cpp
diff --git a/Source/web/WebAccessibilityObject.cpp b/Source/web/WebAccessibilityObject.cpp
index 02d71810b2d14ce173a2cad28700dd62add9a7c2..1b303d6b33f51cd024527b028c5b962eed9c875f 100644
--- a/Source/web/WebAccessibilityObject.cpp
+++ b/Source/web/WebAccessibilityObject.cpp
@@ -591,6 +591,7 @@ bool WebAccessibilityObject::press() const
     return m_private->press();
 }
 
+// Deprecated in favor of role().
 WebAccessibilityRole WebAccessibilityObject::roleValue() const
 {
     if (isDetached())
@@ -599,6 +600,14 @@ WebAccessibilityRole WebAccessibilityObject::roleValue() const
     return static_cast<WebAccessibilityRole>(m_private->roleValue());
 }
 
+WebAXTypes::Role WebAccessibilityObject::role() const
+{
+    if (isDetached())
+        return WebKit::WebAXTypes::UnknownRole;
+
+    return static_cast<WebAXTypes::Role>(m_private->roleValue());
+}
+
 unsigned WebAccessibilityObject::selectionEnd() const
 {
     if (isDetached())