Document attribute charset and its aliases to return UTF-8

LayoutTests/dom/xhtml/level3/core/documentgetinputencoding02.js

 /*
 Copyright © 2001-2004 World Wide Web Consortium,
 (Massachusetts Institute of Technology, European Research Consortium
 for Informatics and Mathematics, Keio University). All
 Rights Reserved. This work is distributed under the W3C® Software License [1] in the
 hope that it will be useful, but WITHOUT ANY WARRANTY; without even
 the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 
 [1] http://www.w3.org/Consortium/Legal/2002/copyright-software-20021231
 */
@@ skipping 77 matching lines @@
       var docElem;
       var rootNS;
       var rootName;
 
       var docRef = null;
       if (typeof(this.doc) != 'undefined') {
         docRef = this.doc;
       }
       doc = load(docRef, "doc", "barfoo");
       domImpl = doc.implementation;
-docElem = doc.documentElement;
+      docElem = doc.documentElement;
 
       rootNS = docElem.namespaceURI;
 
       rootName = docElem.tagName;
 
       newDoc = domImpl.createDocument(rootNS,rootName,nullDocType);
       encodingName = newDoc.inputEncoding;
 
-      assertNull("documentgetinputencoding02",encodingName);
-
+      assertEquals("documentgetinputencoding02", "UTF-8", encodingName);
 }
 
 function runTest() {
    documentgetinputencoding02();
 }