Hide isXXX() type checking methods in subclasses

Source/core/svg/SVGElement.h

Index: Source/core/svg/SVGElement.h
diff --git a/Source/core/svg/SVGElement.h b/Source/core/svg/SVGElement.h
index 47fc74e159feb5ef5930ac98ac89b6d3960503c8..8c347328d185d14a52a7f75757c3a3f883a459d9 100644
--- a/Source/core/svg/SVGElement.h
+++ b/Source/core/svg/SVGElement.h
@@ -229,6 +229,9 @@ private:
     // https://bugs.webkit.org/show_bug.cgi?id=77938
     virtual bool areAuthorShadowsAllowed() const OVERRIDE FINAL { return false; }
 
+    bool isSVGElement() const WTF_DELETED_FUNCTION; // Hide to catch useless calls.
+    bool isStyledElement() const WTF_DELETED_FUNCTION; // Hide to catch useless calls.
+
     RenderStyle* computedStyle(PseudoId = NOPSEUDO);
     virtual RenderStyle* virtualComputedStyle(PseudoId pseudoElementSpecifier = NOPSEUDO) OVERRIDE FINAL { return computedStyle(pseudoElementSpecifier); }
     virtual void willRecalcStyle(StyleRecalcChange) OVERRIDE;