Hide isXXX() type checking methods in subclasses

Source/core/dom/CharacterData.h

Index: Source/core/dom/CharacterData.h
diff --git a/Source/core/dom/CharacterData.h b/Source/core/dom/CharacterData.h
index 0859d949b57fa4ece8836236bbf2d0b9ca8ff5b1..3867309de25106cfcb185441025a4f66bf63f1c6 100644
--- a/Source/core/dom/CharacterData.h
+++ b/Source/core/dom/CharacterData.h
@@ -75,6 +75,9 @@ private:
     virtual int maxCharacterOffset() const OVERRIDE FINAL;
     virtual bool offsetInCharacters() const OVERRIDE FINAL;
     void setDataAndUpdate(const String&, unsigned offsetOfReplacedData, unsigned oldLength, unsigned newLength, RecalcStyleBehavior = DoNotRecalcStyle);
+
+    bool isContainerNode() const WTF_DELETED_FUNCTION; // Hide to catch useless calls.
+    bool isElementNode() const WTF_DELETED_FUNCTION; // Hide to catch useless calls.
 };
 
 DEFINE_NODE_TYPE_CASTS(CharacterData, isCharacterDataNode());