Use browsers JSON.parse for parsing JSON.

runtime/bin/json_patch.dart

Index: runtime/bin/json_patch.dart
diff --git a/sdk/lib/chrome/dartium/chrome_dartium.dart b/runtime/bin/json_patch.dart
similarity index 71%
copy from sdk/lib/chrome/dartium/chrome_dartium.dart
copy to runtime/bin/json_patch.dart
index c2286553e46c7790c0c932cfb76c98b6266b81d3..7d1056a8f242a47091a265f5ab27012eb25c3ebf 100644
--- a/sdk/lib/chrome/dartium/chrome_dartium.dart
+++ b/runtime/bin/json_patch.dart
@@ -1,9 +1,7 @@
-library chrome;
-
 // 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.
 
-// DO NOT EDIT
-// Auto-generated dart:chrome library.
 
+patch parse(String json, [reviver(var key, var value)]) =>
+    _parse(json, reviver);