Implement computedRole and computedName (behind a flag)

Source/core/dom/Node.h

Index: Source/core/dom/Node.h
diff --git a/Source/core/dom/Node.h b/Source/core/dom/Node.h
index 776d802e128ec037658f8e83d2b1020a9ef2749c..353035a10173a0b30b58cd33f7f9aa22b850de2e 100644
--- a/Source/core/dom/Node.h
+++ b/Source/core/dom/Node.h
@@ -223,6 +223,9 @@ public:
     String textContent(bool convertBRsToNewlines = false) const;
     void setTextContent(const String&);
 
+    const AtomicString& computedRole();
+    const String computedText();
+
     // Other methods (not part of DOM)
 
     bool isElementNode() const { return getFlag(IsElementFlag); }