fixes #40, extension methods for primitive types

test/generated_sdk/lib/_internal/compiler/js_lib/js_helper.dart

 // Copyright (c) 2013, 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.
 
 library _js_helper;
 
 import 'dart:_js_embedded_names' show
     ALL_CLASSES,
     GET_ISOLATE_TAG,
     INTERCEPTED_NAMES,
@@ skipping 75 matching lines @@
 /// Marks the internal map in dart2js, so that internal libraries can is-check
 // them.
 abstract class InternalMap {
 }
 
 /// No-op method that is called to inform the compiler that preambles might
 /// be needed when executing the resulting JS file in a command-line
 /// JS engine.
 requiresPreamble() {}
 
-bool isJsIndexable(var object, var record) {
-  if (record != null) {
-    var result = dispatchRecordIndexability(record);
-    if (result != null) return result;
-  }
-  return object is JavaScriptIndexingBehavior;
-}
-
 String S(value) {
   if (value is String) return value;
   if (value is num) {
     if (value != 0) {
       // ""+x is faster than String(x) for integers on most browsers.
       return JS('String', r'"" + (#)', value);
     }
   } else if (true == value) {
     return 'true';
   } else if (false == value) {
@@ skipping 3345 matching lines @@
   throw new MainError("No top-level function named 'main'.");
 }
 
 void badMain() {
   throw new MainError("'main' is not a function.");
 }
 
 void mainHasTooManyParameters() {
   throw new MainError("'main' expects too many parameters.");
 }