Update test expectation for Safari to account for JSON.parse bug.

tests/lib/convert/json_test.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.
 
 library json_test;
 
 import "package:expect/expect.dart";
 import "dart:convert";
 
 bool badFormat(e) => e is FormatException;
@@ skipping 64 matching lines @@
     for (var expval in ["0", "1", "200"]) {
       exponentList.add("$exphead$expval");
     }
   }
 
   for (var integer in integerList) {
     for (var sign in signList) {
       for (var fraction in fractionList) {
         for (var exp in exponentList) {
           var literal = "$sign$integer$fraction$exp";
-          var parseNumber =
-              ((fraction == "" && exp == "") ? (String x) => int.parse(x)
-                                             : (String x) => double.parse(x));
-          var expectedValue = parseNumber(literal);
+          var expectedValue = num.parse(literal);
           testJson(literal, expectedValue);
         }
       }
     }
   }
 
   // Negative tests (syntax error).
   // testError thoroughly tests the given parts with a lot of valid
   // values for the other parts.
   testError({signs, integers, fractions, exponents}) {
@@ skipping 189 matching lines @@
 }
 
 main() {
   testNumbers();
   testStrings();
   testWords();
   testObjects();
   testArrays();
   testWhitespace();
 }