dartium_js_interop changes

tools/dom/src/native_DOMImplementation.dart

 // 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.
 
 part of html;
 
 class _ConsoleVariables {
   Map<String, Object> _data = new Map<String, Object>();
 
   /**
@@ skipping 367 matching lines @@
    * This method is used as Library prefixes include a trailing dot when using
    * the C Dart debugger API.
    */
   static String stripTrailingDot(String str) =>
     (str != null && str[str.length - 1] == '.') ? str.substring(0, str.length - 1) : str;
 
   static String addTrailingDot(String str) => '${str}.';
 
   static bool isNoSuchMethodError(obj) => obj is NoSuchMethodError;
 
-  // TODO(jacobr): we need a failsafe way to determine that a Node is really a
-  // DOM node rather than just a class that extends Node.
-  static bool isNode(obj) => obj is Node;
-
   static bool _isBuiltinType(ClassMirror cls) {
     // TODO(vsm): Find a less hackish way to do this.
     LibraryMirror lib = cls.owner;
     String libName = lib.uri.toString();
     return libName.startsWith('dart:');
   }
 
   static void register(Document document, String tag, Type type,
       String extendsTagName) {
     // TODO(vsm): Move these checks into native code.
@@ skipping 120 matching lines @@
 };
 
 get _pureIsolateTimerFactoryClosure =>
     ((int milliSeconds, void callback(Timer time), bool repeating) =>
   throw new UnimplementedError("Timers on background isolates "
                                "are not supported in the browser"));
 
 void _initializeCustomElement(Element e) {
   _Utils.initializeCustomElement(e);
 }