Use new is*Element() helper functions even more in HTML code

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 615 matching lines @@
 }
 
 void HTMLElement::setTranslate(bool enable)
 {
     setAttribute(translateAttr, enable ? "yes" : "no");
 }
 
 HTMLFormElement* HTMLElement::findFormAncestor() const
 {
     for (ContainerNode* ancestor = parentNode(); ancestor; ancestor = ancestor->parentNode()) {
-        if (ancestor->hasTagName(formTag))
+        if (isHTMLFormElement(*ancestor))
             return toHTMLFormElement(ancestor);
     }
     return 0;
 }
 
 static inline bool elementAffectsDirectionality(const Node* node)
 {
-    return node->isHTMLElement() && (node->hasTagName(bdiTag) || toHTMLElement(node)->hasAttribute(dirAttr));
+    return node->isHTMLElement() && (isHTMLBDIElement(*node) || toHTMLElement(node)->hasAttribute(dirAttr));
 }
 
 static void setHasDirAutoFlagRecursively(Node* firstNode, bool flag, Node* lastNode = 0)
 {
     firstNode->setSelfOrAncestorHasDirAutoAttribute(flag);
 
     Node* node = firstNode->firstChild();
 
     while (node) {
         if (node->selfOrAncestorHasDirAutoAttribute() == flag)
@@ skipping 14 matching lines @@
 
 void HTMLElement::childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta)
 {
     Element::childrenChanged(changedByParser, beforeChange, afterChange, childCountDelta);
     adjustDirectionalityIfNeededAfterChildrenChanged(beforeChange, childCountDelta);
 }
 
 bool HTMLElement::hasDirectionAuto() const
 {
     const AtomicString& direction = fastGetAttribute(dirAttr);
-    return (hasTagName(bdiTag) && direction == nullAtom) || equalIgnoringCase(direction, "auto");
+    return (isHTMLBDIElement(*this) && direction == nullAtom) || equalIgnoringCase(direction, "auto");
 }
 
 TextDirection HTMLElement::directionalityIfhasDirAutoAttribute(bool& isAuto) const
 {
     if (!(selfOrAncestorHasDirAutoAttribute() && hasDirectionAuto())) {
         isAuto = false;
         return LTR;
     }
 
     isAuto = true;
     return directionality();
 }
 
 TextDirection HTMLElement::directionality(Node** strongDirectionalityTextNode) const
 {
-    if (hasTagName(inputTag)) {
+    if (isHTMLInputElement(*this)) {
         HTMLInputElement* inputElement = toHTMLInputElement(const_cast<HTMLElement*>(this));
         bool hasStrongDirectionality;
         TextDirection textDirection = determineDirectionality(inputElement->value(), hasStrongDirectionality);
         if (strongDirectionalityTextNode)
             *strongDirectionalityTextNode = hasStrongDirectionality ? inputElement : 0;
         return textDirection;
     }
 
     Node* node = firstChild();
     while (node) {
         // Skip bdi, script, style and text form controls.
-        if (equalIgnoringCase(node->nodeName(), "bdi") || node->hasTagName(scriptTag) || node->hasTagName(styleTag)
+        if (equalIgnoringCase(node->nodeName(), "bdi") || isHTMLScriptElement(*node) || isHTMLStyleElement(*node)
             || (node->isElementNode() && toElement(node)->isTextFormControl())) {
             node = NodeTraversal::nextSkippingChildren(*node, this);
             continue;
         }
 
         // Skip elements with valid dir attribute
         if (node->isElementNode()) {
             AtomicString dirAttributeValue = toElement(node)->fastGetAttribute(dirAttr);
             if (isValidDirAttribute(dirAttributeValue)) {
                 node = NodeTraversal::nextSkippingChildren(*node, this);
@@ skipping 250 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