fixes #40, extension methods for primitive types

tool/input_sdk/patch/core_patch.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.
 
 // Patch file for dart:core classes.
 import "dart:_internal" as _symbol_dev;
 import 'dart:_interceptors';
 import 'dart:_js_helper' show patch,
                               checkInt,
                               getRuntimeType,
                               jsonEncodeNative,
                               JSSyntaxRegExp,
                               Primitives,
                               stringJoinUnchecked,
                               objectHashCode;
 
 import 'dart:_foreign_helper' show JS;
 
 String _symbolToString(Symbol symbol) => _symbol_dev.Symbol.getName(symbol);
 
-_symbolMapToStringMap(Map<Symbol, dynamic> map) {
-  if (map == null) return null;
-  var result = new Map<String, dynamic>();
-  map.forEach((Symbol key, value) {
-    result[_symbolToString(key)] = value;
-  });
-  return result;
-}
-
-class SupportJsExtensionMethods {
-  const SupportJsExtensionMethods();
-}
-
 @patch
 int identityHashCode(Object object) => objectHashCode(object);
 
 // Patch for Object implementation.
 @patch
 class Object {
   @patch
   int get hashCode => Primitives.objectHashCode(this);
 
 
@@ skipping 187 matching lines @@
   @patch
   static void _initTicker() {
     Primitives.initTicker();
     _frequency = Primitives.timerFrequency;
   }
 
   @patch
   static int _now() => Primitives.timerTicks();
 }
 
-class _ListConstructorSentinel {
-  const _ListConstructorSentinel();
-}
-
 // Patch for List implementation.
 @patch
 class List<E> {
   @patch
   factory List([int length]) {
     dynamic list;
     if (length == null) {
       list = JS('', '[]');
     } else {
       // Explicit type test is necessary to guard against JavaScript conversions
       // in unchecked mode.
       if ((length is !int) || (length < 0)) {
         throw new ArgumentError("Length must be a non-negative integer: $length");
       }
-      list = JS('', 'new Array(#)', length);
-      // TODO(jmesserly): consider a fixed array subclass instead.
-      JS('void', r'#.fixed$length = Array', list);
+      list = JSArray.markFixedList(JS('', 'new Array(#)', length));
     }
-    // TODO(jmesserly): skip this when E is dynamic and Object.
-    JS('void', 'dart.setType(#, List\$(#))', list, E);
-    // TODO(jmesserly): compiler creates a bogus type check here.
-    return list;
+    return new JSArray<E>.typed(list);
   }
 
   @patch
   factory List.filled(int length, E fill) {
     List<E> result = new List<E>(length);
     if (length != 0 && fill != null) {
       for (int i = 0; i < result.length; i++) {
         result[i] = fill;
       }
     }
@@ skipping 189 matching lines @@
   @patch
   static bool get _isWindows => false;
 
   @patch
   static Uri get base {
     String uri = Primitives.currentUri();
     if (uri != null) return Uri.parse(uri);
     throw new UnsupportedError("'Uri.base' is not supported");
   }
 }