Use new is*Element() helper functions in CSS code

Source/core/css/SelectorChecker.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011. All rights reserved.
@@ skipping 712 matching lines @@
             if (m_mode == ResolvingStyle) {
                 if (context.elementStyle)
                     context.elementStyle->setAffectedByFocus();
                 else
                     element.setChildrenAffectedByFocus();
             }
             return matchesFocusPseudoClass(element);
         case CSSSelector::PseudoHover:
             // If we're in quirks mode, then hover should never match anchors with no
             // href and *:hover should not match anything. This is important for sites like wsj.com.
-            if (m_strictParsing || context.isSubSelector || (selector.m_match == CSSSelector::Tag && selector.tagQName() != anyQName() && !element.hasTagName(aTag)) || element.isLink()) {
+            if (m_strictParsing || context.isSubSelector || (selector.m_match == CSSSelector::Tag && selector.tagQName() != anyQName() && !isHTMLAnchorElement(element)) || element.isLink()) {
                 if (m_mode == ResolvingStyle) {
                     if (context.elementStyle)
                         context.elementStyle->setAffectedByHover();
                     else
                         element.setChildrenAffectedByHover();
                 }
                 if (element.hovered() || InspectorInstrumentation::forcePseudoState(&element, CSSSelector::PseudoHover))
                     return true;
             }
             break;
         case CSSSelector::PseudoActive:
             // If we're in quirks mode, then :active should never match anchors with no
             // href and *:active should not match anything.
-            if (m_strictParsing || context.isSubSelector || (selector.m_match == CSSSelector::Tag && selector.tagQName() != anyQName() && !element.hasTagName(aTag)) || element.isLink()) {
+            if (m_strictParsing || context.isSubSelector || (selector.m_match == CSSSelector::Tag && selector.tagQName() != anyQName() && !isHTMLAnchorElement(element)) || element.isLink()) {
                 if (m_mode == ResolvingStyle) {
                     if (context.elementStyle)
                         context.elementStyle->setAffectedByActive();
                     else
                         element.setChildrenAffectedByActive();
                 }
                 if (element.active() || InspectorInstrumentation::forcePseudoState(&element, CSSSelector::PseudoActive))
                     return true;
             }
             break;
         case CSSSelector::PseudoEnabled:
-            if (element.isFormControlElement() || element.hasTagName(optionTag) || element.hasTagName(optgroupTag))
+            if (element.isFormControlElement() || isHTMLOptionElement(element) || isHTMLOptGroupElement(element))
                 return !element.isDisabledFormControl();
             break;
         case CSSSelector::PseudoFullPageMedia:
             return element.document().isMediaDocument();
             break;
         case CSSSelector::PseudoDefault:
             return element.isDefaultButtonForForm();
         case CSSSelector::PseudoDisabled:
-            if (element.isFormControlElement() || element.hasTagName(optionTag) || element.hasTagName(optgroupTag))
+            if (element.isFormControlElement() || isHTMLOptionElement(element) || isHTMLOptGroupElement(element))
                 return element.isDisabledFormControl();
             break;
         case CSSSelector::PseudoReadOnly:
             return element.matchesReadOnlyPseudoClass();
         case CSSSelector::PseudoReadWrite:
             return element.matchesReadWritePseudoClass();
         case CSSSelector::PseudoOptional:
             return element.isOptionalFormControl();
         case CSSSelector::PseudoRequired:
             return element.isRequiredFormControl();
         case CSSSelector::PseudoValid:
             element.document().setContainsValidityStyleRules();
             return element.willValidate() && element.isValidFormControlElement();
         case CSSSelector::PseudoInvalid:
             element.document().setContainsValidityStyleRules();
             return element.willValidate() && !element.isValidFormControlElement();
         case CSSSelector::PseudoChecked:
             {
-                if (element.hasTagName(inputTag)) {
+                if (isHTMLInputElement(element)) {
                     HTMLInputElement& inputElement = toHTMLInputElement(element);
                     // Even though WinIE allows checked and indeterminate to
                     // co-exist, the CSS selector spec says that you can't be
                     // both checked and indeterminate. We will behave like WinIE
                     // behind the scenes and just obey the CSS spec here in the
                     // test for matching the pseudo.
                     if (inputElement.shouldAppearChecked() && !inputElement.shouldAppearIndeterminate())
                         return true;
-                } else if (element.hasTagName(optionTag) && toHTMLOptionElement(element).selected())
+                } else if (isHTMLOptionElement(element) && toHTMLOptionElement(element).selected())
                     return true;
                 break;
             }
         case CSSSelector::PseudoIndeterminate:
             return element.shouldAppearIndeterminate();
         case CSSSelector::PseudoRoot:
             if (element == element.document().documentElement())
                 return true;
             break;
         case CSSSelector::PseudoLang:
@@ skipping 276 matching lines @@
     return element.focused() && isFrameFocused(element);
 }
 
 template
 SelectorChecker::Match SelectorChecker::match(const SelectorCheckingContext&, const DOMSiblingTraversalStrategy&, MatchResult*) const;
 
 template
 SelectorChecker::Match SelectorChecker::match(const SelectorCheckingContext&, const ShadowDOMSiblingTraversalStrategy&, MatchResult*) const;
 
 }