Implement computedRole and computedName (behind a flag)

Source/modules/accessibility/AXObjectCacheImpl.cpp

Index: Source/modules/accessibility/AXObjectCacheImpl.cpp
diff --git a/Source/modules/accessibility/AXObjectCacheImpl.cpp b/Source/modules/accessibility/AXObjectCacheImpl.cpp
index ab190e195d09f9c58ed60f5fc7aa43aeaeab8063..dd277299cf5894ef6f1935ee8370f21cb8d43abc 100644
--- a/Source/modules/accessibility/AXObjectCacheImpl.cpp
+++ b/Source/modules/accessibility/AXObjectCacheImpl.cpp
@@ -1074,6 +1074,24 @@ 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::computedNameForNode(Node* node)
+{
+    AXObject* obj = getOrCreate(node);
+    if (!obj)
+        return "";
+
+    String description = obj->accessibilityDescription();
+    return description.isNull() ? obj->title() : description;
+}
+
 void AXObjectCacheImpl::setCanvasObjectBounds(Element* element, const LayoutRect& rect)
 {
     AXObject* obj = getOrCreate(element);