Use new is*Element() helper functions in page/ code

Source/core/page/PageSerializer.cpp

Index: Source/core/page/PageSerializer.cpp
diff --git a/Source/core/page/PageSerializer.cpp b/Source/core/page/PageSerializer.cpp
index 6cff82f3532b51622b593c30c1776647c8eedd4c..e0d33427e37c32458e7c29a82e17f749ffe84514 100644
--- a/Source/core/page/PageSerializer.cpp
+++ b/Source/core/page/PageSerializer.cpp
@@ -53,6 +53,7 @@
 #include "core/html/HTMLImageElement.h"
 #include "core/html/HTMLInputElement.h"
 #include "core/html/HTMLLinkElement.h"
+#include "core/html/HTMLMetaElement.h"
 #include "core/html/HTMLStyleElement.h"
 #include "core/html/parser/HTMLParserIdioms.h"
 #include "core/page/Page.h"
@@ -70,12 +71,10 @@ namespace WebCore {
 
 static bool isCharsetSpecifyingNode(const Node& node)
 {
-    if (!node.isHTMLElement())
+    if (!isHTMLMetaElement(node))
         return false;
 
-    const HTMLElement& element = toHTMLElement(node);
-    if (!element.hasTagName(HTMLNames::metaTag))
-        return false;
+    const HTMLMetaElement& element = toHTMLMetaElement(node);
     HTMLAttributeList attributes;
     if (element.hasAttributes()) {
         unsigned attributeCount = element.attributeCount();
@@ -91,13 +90,13 @@ static bool isCharsetSpecifyingNode(const Node& node)
 
 static bool shouldIgnoreElement(const Element& element)
 {
-    return element.hasTagName(HTMLNames::scriptTag) || element.hasTagName(HTMLNames::noscriptTag) || isCharsetSpecifyingNode(element);
+    return isHTMLScriptElement(element) || isHTMLNoScriptElement(element) || isCharsetSpecifyingNode(element);
 }
 
 static const QualifiedName& frameOwnerURLAttributeName(const HTMLFrameOwnerElement& frameOwner)
 {
     // FIXME: We should support all frame owners including applets.
-    return frameOwner.hasTagName(HTMLNames::objectTag) ? HTMLNames::dataAttr : HTMLNames::srcAttr;
+    return isHTMLObjectElement(frameOwner) ? HTMLNames::dataAttr : HTMLNames::srcAttr;
 }
 
 class SerializerMarkupAccumulator FINAL : public MarkupAccumulator {
@@ -139,7 +138,7 @@ void SerializerMarkupAccumulator::appendElement(StringBuilder& out, Element& ele
     if (!shouldIgnoreElement(element))
         MarkupAccumulator::appendElement(out, element, namespaces);
 
-    if (element.hasTagName(HTMLNames::headTag)) {
+    if (isHTMLHeadElement(element)) {
         out.append("<meta charset=\"");
         out.append(m_document.charset());
         out.append("\">");
@@ -225,26 +224,26 @@ void PageSerializer::serializeFrame(LocalFrame* frame)
         if (element.isStyledElement())
             retrieveResourcesForProperties(element.inlineStyle(), document);
 
-        if (element.hasTagName(HTMLNames::imgTag)) {
+        if (isHTMLImageElement(element)) {
             HTMLImageElement& imageElement = toHTMLImageElement(element);
             KURL url = document.completeURL(imageElement.getAttribute(HTMLNames::srcAttr));
             ImageResource* cachedImage = imageElement.cachedImage();
             addImageToResources(cachedImage, imageElement.renderer(), url);
-        } else if (element.hasTagName(HTMLNames::inputTag)) {
+        } else if (isHTMLInputElement(element)) {
             HTMLInputElement& inputElement = toHTMLInputElement(element);
             if (inputElement.isImageButton() && inputElement.hasImageLoader()) {
                 KURL url = inputElement.src();
                 ImageResource* cachedImage = inputElement.imageLoader()->image();
                 addImageToResources(cachedImage, inputElement.renderer(), url);
             }
-        } else if (element.hasTagName(HTMLNames::linkTag)) {
+        } else if (isHTMLLinkElement(element)) {
             HTMLLinkElement& linkElement = toHTMLLinkElement(element);
             if (CSSStyleSheet* sheet = linkElement.sheet()) {
                 KURL url = document.completeURL(linkElement.getAttribute(HTMLNames::hrefAttr));
                 serializeCSSStyleSheet(sheet, url);
                 ASSERT(m_resourceURLs.contains(url));
             }
-        } else if (element.hasTagName(HTMLNames::styleTag)) {
+        } else if (isHTMLStyleElement(element)) {
             HTMLStyleElement& styleElement = toHTMLStyleElement(element);
             if (CSSStyleSheet* sheet = styleElement.sheet())
                 serializeCSSStyleSheet(sheet, KURL());