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

Source/core/css/CSSStyleSheet.cpp

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2006, 2007, 2012 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
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 18 matching lines @@
 #include "core/css/CSSImportRule.h"
 #include "core/css/parser/BisonCSSParser.h"
 #include "core/css/CSSRuleList.h"
 #include "core/css/MediaList.h"
 #include "core/css/StyleRule.h"
 #include "core/css/StyleSheetContents.h"
 #include "core/dom/Document.h"
 #include "core/dom/ExceptionCode.h"
 #include "core/dom/Node.h"
 #include "core/frame/UseCounter.h"
+#include "core/html/HTMLStyleElement.h"
 #include "core/inspector/InspectorInstrumentation.h"
+#include "core/svg/SVGStyleElement.h"
 #include "platform/weborigin/SecurityOrigin.h"
 #include "wtf/text/StringBuilder.h"
 
 namespace WebCore {
 
 class StyleSheetCSSRuleList FINAL : public CSSRuleList {
 public:
     StyleSheetCSSRuleList(CSSStyleSheet* sheet) : m_styleSheet(sheet) { }
 
 private:
     virtual void ref() OVERRIDE { m_styleSheet->ref(); }
     virtual void deref() OVERRIDE { m_styleSheet->deref(); }
 
     virtual unsigned length() const OVERRIDE { return m_styleSheet->length(); }
     virtual CSSRule* item(unsigned index) const OVERRIDE { return m_styleSheet->item(index); }
 
     virtual CSSStyleSheet* styleSheet() const OVERRIDE { return m_styleSheet; }
 
     CSSStyleSheet* m_styleSheet;
 };
 
 #if !ASSERT_DISABLED
 static bool isAcceptableCSSStyleSheetParent(Node* parentNode)
 {
     // Only these nodes can be parents of StyleSheets, and they need to call clearOwnerNode() when moved out of document.
     return !parentNode
         || parentNode->isDocumentNode()
-        || parentNode->hasTagName(HTMLNames::linkTag)
-        || parentNode->hasTagName(HTMLNames::styleTag)
-        || parentNode->hasTagName(SVGNames::styleTag)
+        || isHTMLLinkElement(*parentNode)
+        || isHTMLStyleElement(*parentNode)
+        || isSVGStyleElement(*parentNode)
         || parentNode->nodeType() == Node::PROCESSING_INSTRUCTION_NODE;
 }
 #endif
 
 PassRefPtrWillBeRawPtr<CSSStyleSheet> CSSStyleSheet::create(PassRefPtrWillBeRawPtr<StyleSheetContents> sheet, CSSImportRule* ownerRule)
 {
     return adoptRefWillBeRefCountedGarbageCollected(new CSSStyleSheet(sheet, ownerRule));
 }
 
 PassRefPtrWillBeRawPtr<CSSStyleSheet> CSSStyleSheet::create(PassRefPtrWillBeRawPtr<StyleSheetContents> sheet, Node* ownerNode)
@@ skipping 335 matching lines @@
 void CSSStyleSheet::trace(Visitor* visitor)
 {
     visitor->trace(m_contents);
     visitor->trace(m_mediaQueries);
     visitor->trace(m_ownerRule);
     visitor->trace(m_mediaCSSOMWrapper);
     visitor->trace(m_childRuleCSSOMWrappers);
 }
 
 }