Implement computedRole and computedName (behind a flag)

Source/modules/accessibility/AXObjectCacheImpl.cpp

 /*
  * Copyright (C) 2014, 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 1056 matching lines @@
     if (targetAXObject && !targetAXObject->children().isEmpty())
         targetAXObject = targetAXObject->children()[0].get();
     postPlatformNotification(targetAXObject, AXScrollPositionChanged);
 }
 
 void AXObjectCacheImpl::handleScrollPositionChanged(RenderObject* renderObject)
 {
     postPlatformNotification(getOrCreate(renderObject), AXScrollPositionChanged);
 }
 
+const AtomicString& AXObjectCacheImpl::computedRoleForNode(Node* node)
+{
+    AXObject* obj = getOrCreate(node);
+    if (!obj)
+        return AXObject::roleName(UnknownRole);
+    return AXObject::roleName(obj->roleValue());
+}
+
+String AXObjectCacheImpl::computedTextForNode(Node* node)
+{
+    AXObject* obj = getOrCreate(node);
+    if (!obj)
+        return "";
+    return obj->title();
+}
+
 void AXObjectCacheImpl::setCanvasObjectBounds(Element* element, const LayoutRect& rect)
 {
     AXObject* obj = getOrCreate(element);
     if (!obj)
         return;
 
     obj->setElementRect(rect);
 }
 
 } // namespace blink