Fix int.parse bug (dart2js version)

tests/corelib/double_parse_test.dart

 // Copyright (c) 2014 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.
 
 import "dart:math" show pow;
 import "package:expect/expect.dart";
 
 const whiteSpace = const [
   "",
   "\x09",
@@ skipping 96 matching lines @@
 }
 
 void testFail(String source) {
   var object = new Object();
   Expect.throws(() {
     double.parse(source, (s) {
       Expect.equals(source, s);
       throw object;
     });
   }, (e) => identical(object, e), "Fail: '$source'");
+  Expect.equals(1.5, double.parse(source, (s) => 1.5));
 }
 
 void main() {
   testDouble(0.0);
   testDouble(5e-324);
   testDouble(2.225073858507201e-308);
   testDouble(2.2250738585072014e-308);
   testDouble(0.49999999999999994);
   testDouble(0.5);
   testDouble(0.50000000000000006);
@@ skipping 1021 matching lines @@
   testFail("INFINITY");
   testFail("1.#INF");
   testFail("inf");
   testFail("nan");
   testFail("NAN");
   testFail("1.#IND");
   testFail("indef");
   testFail("qnan");
   testFail("snan");
 }