Refactoring: toHTMLElement(const Node*) added but never used. Using it.

Source/core/html/HTMLElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2011 Motorola Mobility. 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 724 matching lines @@
     if (equalIgnoringCase(value, "no"))
         return TranslateAttributeNo;
 
     return TranslateAttributeInherit;
 }
 
 bool HTMLElement::translate() const
 {
     for (const Node* n = this; n; n = n->parentNode()) {
         if (n->isHTMLElement()) {
-            TranslateAttributeMode mode = static_cast<const HTMLElement*>(n)->translateAttributeMode();
+            TranslateAttributeMode mode = toHTMLElement(n)->translateAttributeMode();
             if (mode != TranslateAttributeInherit) {
                 ASSERT(mode == TranslateAttributeYes || mode == TranslateAttributeNo);
                 return mode == TranslateAttributeYes;
             }
         }
     }
 
     // Default on the root element is translate=yes.
     return true;
 }
@@ skipping 343 matching lines @@
 #ifndef NDEBUG
 
 // For use in the debugger
 void dumpInnerHTML(WebCore::HTMLElement*);
 
 void dumpInnerHTML(WebCore::HTMLElement* element)
 {
     printf("%s\n", element->innerHTML().ascii().data());
 }
 #endif