Deprecate Math object in corelib in favor of dart:math library.

lib/json/json.dart

Index: lib/json/json.dart
diff --git a/lib/json/json.dart b/lib/json/json.dart
index a2fc308e34ba7b53517cbe023d9543b1893646ec..5238c15b8a56ee99ef04d0ea09cf8be20c7cbb0a 100644
--- a/lib/json/json.dart
+++ b/lib/json/json.dart
@@ -1,9 +1,11 @@
-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
+// 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("dart:json");
 
+#import('dart:math');
+
 // Pure Dart implementation of JSON protocol.
 
 /**
@@ -289,7 +291,7 @@ class _JsonParser {
             }
             final codeString = json.substring(position + 1, position + 5);
             try {
-              c = Math.parseInt('0x${codeString}');
+              c = parseInt('0x${codeString}');
             } catch (var e) {
               _error('Invalid unicode esacape sequence');
             }
@@ -347,9 +349,9 @@ class _JsonParser {
 
     String number = json.substring(startPos, position);
     if (isInt) {
-      return Math.parseInt(number);
+      return parseInt(number);
     } else {
-      return Math.parseDouble(number);
+      return parseDouble(number);
     }
   }