Clarify comments for methods added in r178921

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 9f0f8117a5b2fd6c6a4f2b0dc445cf6e7c1dd5e6..06323954ed39da6028469a39de75eec16cf831e4 100644
--- a/Source/core/svg/SVGElement.h
+++ b/Source/core/svg/SVGElement.h
@@ -234,8 +234,8 @@ 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.
+    bool isSVGElement() const WTF_DELETED_FUNCTION; // This will catch anyone doing an unnecessary check.
+    bool isStyledElement() const WTF_DELETED_FUNCTION; // This will catch anyone doing an unnecessary check.
 
     RenderStyle* computedStyle(PseudoId = NOPSEUDO);
     virtual RenderStyle* virtualComputedStyle(PseudoId pseudoElementSpecifier = NOPSEUDO) OVERRIDE FINAL { return computedStyle(pseudoElementSpecifier); }