Use tighter typing in editing: MarkupAccumulator

Source/core/page/PageSerializer.cpp

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 90 matching lines @@
 
 class SerializerMarkupAccumulator FINAL : public MarkupAccumulator {
 public:
     SerializerMarkupAccumulator(PageSerializer*, const Document&, WillBeHeapVector<RawPtrWillBeMember<Node> >*);
     virtual ~SerializerMarkupAccumulator();
 
 protected:
     virtual void appendText(StringBuilder& out, Text&) OVERRIDE;
     virtual void appendElement(StringBuilder& out, Element&, Namespaces*) OVERRIDE;
     virtual void appendCustomAttributes(StringBuilder& out, const Element&, Namespaces*) OVERRIDE;
-    virtual void appendEndTag(const Node&) OVERRIDE;
+    virtual void appendEndTag(const Element&) OVERRIDE;
 
 private:
     PageSerializer* m_serializer;
     const Document& m_document;
 };
 
 SerializerMarkupAccumulator::SerializerMarkupAccumulator(PageSerializer* serializer, const Document& document, WillBeHeapVector<RawPtrWillBeMember<Node> >* nodes)
     : MarkupAccumulator(nodes, ResolveAllURLs, nullptr)
     , m_serializer(serializer)
     , m_document(document)
@@ skipping 38 matching lines @@
 
     KURL url = toLocalFrame(frame)->document()->url();
     if (url.isValid() && !url.protocolIsAbout())
         return;
 
     // We need to give a fake location to blank frames so they can be referenced by the serialized frame.
     url = m_serializer->urlForBlankFrame(toLocalFrame(frame));
     appendAttribute(out, element, Attribute(frameOwnerURLAttributeName(frameOwner), AtomicString(url.string())), namespaces);
 }
 
-void SerializerMarkupAccumulator::appendEndTag(const Node& node)
+void SerializerMarkupAccumulator::appendEndTag(const Element& element)
 {
-    if (node.isElementNode() && !shouldIgnoreElement(toElement(node)))
-        MarkupAccumulator::appendEndTag(node);
+    if (!shouldIgnoreElement(element))
+        MarkupAccumulator::appendEndTag(element);
 }
 
 PageSerializer::PageSerializer(Vector<SerializedResource>* resources)
     : m_resources(resources)
     , m_blankFrameCounter(0)
 {
 }
 
 void PageSerializer::serialize(Page* page)
 {
@@ skipping 200 matching lines @@
     if (iter != m_blankFrameURLs.end())
         return iter->value;
     String url = "wyciwyg://frame/" + String::number(m_blankFrameCounter++);
     KURL fakeURL(ParsedURLString, url);
     m_blankFrameURLs.add(frame, fakeURL);
 
     return fakeURL;
 }
 
 }