Removing the exclusion of all NamedNodeMap members as they were being used.

sdk/lib/html/dart2js/html_dart2js.dart

 library html;
 
 import 'dart:async';
 import 'dart:collection';
 import 'dart:html_common';
 import 'dart:indexed_db';
 import 'dart:isolate';
 import 'dart:json' as json;
 import 'dart:math';
 import 'dart:svg' as svg;
@@ skipping 14509 matching lines @@
   final String type;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 /// @domName NamedNodeMap; @docsEditable true
 class NamedNodeMap implements JavaScriptIndexingBehavior, List<Node> native "*NamedNodeMap" {
 
+  /// @domName NamedNodeMap.length; @docsEditable true
+  int get length => JS("int", "#.length", this);
+
   Node operator[](int index) => JS("Node", "#[#]", this, index);
 
   void operator[]=(int index, Node value) {
     throw new UnsupportedError("Cannot assign element of immutable List.");
   }
   // -- start List<Node> mixins.
   // Node is the element type.
 
   // From Iterable<Node>:
 
@@ skipping 128 matching lines @@
 
   void insertRange(int start, int rangeLength, [Node initialValue]) {
     throw new UnsupportedError("Cannot insertRange on immutable List.");
   }
 
   List<Node> getRange(int start, int rangeLength) =>
       Lists.getRange(this, start, rangeLength, <Node>[]);
 
   // -- end List<Node> mixins.
 
+  /// @domName NamedNodeMap.getNamedItem; @docsEditable true
+  Node getNamedItem(String name) native;
+
+  /// @domName NamedNodeMap.getNamedItemNS; @docsEditable true
+  Node getNamedItemNS(String namespaceURI, String localName) native;
+
   /// @domName NamedNodeMap.item; @docsEditable true
-  @JSName('item')
-  Node _item(int index) native;
+  Node item(int index) native;
+
+  /// @domName NamedNodeMap.removeNamedItem; @docsEditable true
+  Node removeNamedItem(String name) native;
+
+  /// @domName NamedNodeMap.removeNamedItemNS; @docsEditable true
+  Node removeNamedItemNS(String namespaceURI, String localName) native;
+
+  /// @domName NamedNodeMap.setNamedItem; @docsEditable true
+  Node setNamedItem(Node node) native;
+
+  /// @domName NamedNodeMap.setNamedItemNS; @docsEditable true
+  Node setNamedItemNS(Node node) native;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 /// @domName Navigator; @docsEditable true
 class Navigator native "*Navigator" {
 
   /// @domName Navigator.language; @docsEditable true
@@ skipping 13288 matching lines @@
       _position = nextPosition;
       return true;
     }
     _current = null;
     _position = _array.length;
     return false;
   }
 
   T get current => _current;
 }