Clarify comments for methods added in r178921

Source/core/dom/Element.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003-2011, 2013, 2014 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 543 matching lines @@
     PassRefPtr<RenderStyle> originalStyleForRenderer();
 
     Node* insertAdjacent(const String& where, Node* newChild, ExceptionState&);
 
 private:
     bool hasElementFlag(ElementFlags mask) const { return hasRareData() && hasElementFlagInternal(mask); }
     void setElementFlag(ElementFlags, bool value = true);
     void clearElementFlag(ElementFlags);
     bool hasElementFlagInternal(ElementFlags) const;
 
-    bool isElementNode() const WTF_DELETED_FUNCTION; // Hide to catch useless calls.
-    bool isDocumentFragment() const WTF_DELETED_FUNCTION; // Hide to catch useless calls.
-    bool isDocumentNode() const WTF_DELETED_FUNCTION; // Hide to catch useless calls.
+    bool isElementNode() const WTF_DELETED_FUNCTION; // This will catch anyone doing an unnecessary check.
+    bool isDocumentFragment() const WTF_DELETED_FUNCTION; // This will catch anyone doing an unnecessary check.
+    bool isDocumentNode() const WTF_DELETED_FUNCTION; // This will catch anyone doing an unnecessary check.
 
     void styleAttributeChanged(const AtomicString& newStyleString, AttributeModificationReason);
 
     void updatePresentationAttributeStyle();
 
     void inlineStyleChanged();
     PropertySetCSSStyleDeclaration* inlineStyleCSSOMWrapper();
     void setInlineStyleFromString(const AtomicString&);
 
     StyleRecalcChange recalcOwnStyle(StyleRecalcChange);
@@ skipping 287 matching lines @@
     static PassRefPtrWillBeRawPtr<T> create(const QualifiedName&, Document&)
 #define DEFINE_ELEMENT_FACTORY_WITH_TAGNAME(T) \
     PassRefPtrWillBeRawPtr<T> T::create(const QualifiedName& tagName, Document& document) \
     { \
         return adoptRefWillBeNoop(new T(tagName, document)); \
     }
 
 } // namespace
 
 #endif