Remove Element.nodeNamePreservingCase

Source/core/editing/MarkupAccumulator.cpp

Index: Source/core/editing/MarkupAccumulator.cpp
diff --git a/Source/core/editing/MarkupAccumulator.cpp b/Source/core/editing/MarkupAccumulator.cpp
index 5949967302c9cc5125345238e865461aa62d8f4d..fe4366745d515a1915730ba6108b2ec3efe568f6 100644
--- a/Source/core/editing/MarkupAccumulator.cpp
+++ b/Source/core/editing/MarkupAccumulator.cpp
@@ -393,7 +393,7 @@ void MarkupAccumulator::appendElement(StringBuilder& result, Element& element, N
 void MarkupAccumulator::appendOpenTag(StringBuilder& result, const Element& element, Namespaces* namespaces)
 {
     result.append('<');
-    result.append(element.nodeNamePreservingCase());

[eseidel, 2014/01/31 05:41:01]

I see, we can't use nodeName() because it doesn't preserve case?

I think that the previous code as clearer.  Its not at all clear when reading
this why we go through tagName to get this.

+    result.append(element.tagQName().toString());
     if (!element.document().isHTMLDocument() && namespaces && shouldAddNamespaceElement(element))
         appendNamespace(result, element.prefix(), element.namespaceURI(), *namespaces);
 }
@@ -526,7 +526,7 @@ void MarkupAccumulator::appendEndMarkup(StringBuilder& result, const Node& node)
         return;
 
     result.appendLiteral("</");
-    result.append(toElement(node).nodeNamePreservingCase());
+    result.append(toElement(node).tagQName().toString());
     result.append('>');
 }