Initial overloading implementation in _blink

tools/dom/src/html_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 474 matching lines @@
   _DOMStringMap.internal();
 
   bool containsValue(String value) => Maps.containsValue(this, value);
   bool containsKey(String key) => _blink.Native_DOMStringMap_containsKey(this, key);
   String operator [](String key) => _blink.Native_DOMStringMap_item(this, key);
   void operator []=(String key, String value) => _blink.Native_DOMStringMap_setItem(this, key, value);
   String putIfAbsent(String key, String ifAbsent()) => Maps.putIfAbsent(this, key, ifAbsent);
   String remove(String key) => _blink.Native_DOMStringMap_remove(this, key);
   void clear() => Maps.clear(this);
   void forEach(void f(String key, String value)) => Maps.forEach(this, f);
-  Iterable<String> get keys => _blink.Native_DOMStringMap_get_keys(this, keys);
+  Iterable<String> get keys => _blink.Native_DOMStringMap_get_keys(this);
   Iterable<String> get values => Maps.getValues(this);
   int get length => Maps.length(this);
   bool get isEmpty => Maps.isEmpty(this);
   bool get isNotEmpty => Maps.isNotEmpty(this);
   void addAll(Map<String, String> other) {
     other.forEach((key, value) => this[key] = value);
   }
 }
 
 final _printClosure = window.console.log;
@@ skipping 93 matching lines @@
   _scheduleImmediateHelper._schedule(callback);
 };
 
 get _pureIsolateScheduleImmediateClosure => ((void callback()) =>
   throw new UnimplementedError("scheduleMicrotask in background isolates "
                                "are not supported in the browser"));
 
 void _initializeCustomElement(Element e) {
   _Utils.initializeCustomElement(e);
 }