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

Source/core/html/HTMLOptionElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2004, 2005, 2006, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2011 Motorola Mobility, Inc.  All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 147 matching lines @@
 
     HTMLSelectElement* selectElement = ownerSelectElement();
     if (!selectElement)
         return 0;
 
     int optionIndex = 0;
 
     const Vector<HTMLElement*>& items = selectElement->listItems();
     size_t length = items.size();
     for (size_t i = 0; i < length; ++i) {
-        if (!items[i]->hasTagName(optionTag))
+        if (!isHTMLOptionElement(*items[i]))
             continue;
         if (items[i] == this)
             return optionIndex;
         ++optionIndex;
     }
 
     return 0;
 }
 
 void HTMLOptionElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
@@ skipping 74 matching lines @@
     if (HTMLDataListElement* dataList = ownerDataListElement())
         dataList->optionElementChildrenChanged();
     else if (HTMLSelectElement* select = ownerSelectElement())
         select->optionElementChildrenChanged();
     HTMLElement::childrenChanged(changedByParser, beforeChange, afterChange, childCountDelta);
 }
 
 HTMLDataListElement* HTMLOptionElement::ownerDataListElement() const
 {
     for (ContainerNode* parent = parentNode(); parent ; parent = parent->parentNode()) {
-        if (parent->hasTagName(datalistTag))
+        if (isHTMLDataListElement(*parent))
             return toHTMLDataListElement(parent);
     }
     return 0;
 }
 
 HTMLSelectElement* HTMLOptionElement::ownerSelectElement() const
 {
     ContainerNode* select = parentNode();
-    while (select && !select->hasTagName(selectTag))
+    while (select && !isHTMLSelectElement(*select))
         select = select->parentNode();
 
     if (!select)
         return 0;
 
     return toHTMLSelectElement(select);
 }
 
 String HTMLOptionElement::label() const
 {
@@ skipping 32 matching lines @@
     // FIXME: We ask our owner select to repaint regardless of which property changed.
     if (HTMLSelectElement* select = ownerSelectElement()) {
         if (RenderObject* renderer = select->renderer())
             renderer->repaint();
     }
 }
 
 String HTMLOptionElement::textIndentedToRespectGroupLabel() const
 {
     ContainerNode* parent = parentNode();
-    if (parent && parent->hasTagName(optgroupTag))
+    if (parent && isHTMLOptGroupElement(*parent))
         return "    " + text();
     return text();
 }
 
 bool HTMLOptionElement::isDisabledFormControl() const
 {
     if (ownElementDisabled())
         return true;
     if (Element* parent = parentElement())
-        return parent->hasTagName(optgroupTag) && parent->isDisabledFormControl();
+        return isHTMLOptGroupElement(*parent) && parent->isDisabledFormControl();
     return false;
 }
 
 Node::InsertionNotificationRequest HTMLOptionElement::insertedInto(ContainerNode* insertionPoint)
 {
     if (HTMLSelectElement* select = ownerSelectElement()) {
         select->setRecalcListItems();
         // Do not call selected() since calling updateListItemSelectedStates()
         // at this time won't do the right thing. (Why, exactly?)
         // FIXME: Might be better to call this unconditionally, always passing m_isSelected,
@@ skipping 23 matching lines @@
 
 HTMLFormElement* HTMLOptionElement::form() const
 {
     if (HTMLSelectElement* selectElement = ownerSelectElement())
         return selectElement->formOwner();
 
     return 0;
 }
 
 } // namespace WebCore