Make iterator for Element's attributes more lightweight

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 32d12d4faa2b159558b91ca9c7b4936471c5e2e3..ac6978d8caeaf01949f6c0927014f819b4740416 100644
--- a/Source/core/page/PageSerializer.cpp
+++ b/Source/core/page/PageSerializer.cpp
@@ -77,9 +77,9 @@ static bool isCharsetSpecifyingNode(const Node& node)
     const HTMLMetaElement& element = toHTMLMetaElement(node);
     HTMLAttributeList attributeList;
     if (element.hasAttributes()) {
-        AttributeIteratorAccessor attributes = element.attributesIterator();
-        AttributeConstIterator end = attributes.end();
-        for (AttributeConstIterator it = attributes.begin(); it != end; ++it) {
+        AttributeCollection attributes = element.attributes();
+        AttributeCollection::const_iterator end = attributes.end();
+        for (AttributeCollection::const_iterator it = attributes.begin(); it != end; ++it) {
             // FIXME: We should deal appropriately with the attribute if they have a namespace.
             attributeList.append(std::make_pair(it->name().localName(), it->value().string()));
         }