Made old dart:json library use convert to parse JSON.

sdk/lib/json/json.dart

Index: sdk/lib/json/json.dart
diff --git a/sdk/lib/json/json.dart b/sdk/lib/json/json.dart
index 5fd3a6ae20c0da9e60d0738eaa4e5959abbe91d7..48978ae9f7ff2a2b543e97b385f3b915b5d8c7b7 100644
--- a/sdk/lib/json/json.dart
+++ b/sdk/lib/json/json.dart
@@ -8,6 +8,8 @@
 
 library dart.json;
 
+import "dart:convert";
+
 // JSON parsing and serialization.
 
 /**
@@ -66,17 +68,12 @@ class JsonCyclicError extends JsonUnsupportedObjectError {
  *
  * Throws [FormatException] if the input is not valid JSON text.
  */
-external parse(String json, [reviver(var key, var value)]);
-
-_parse(String json, reviver(var key, var value)) {
-  BuildJsonListener listener;
-  if (reviver == null) {
-    listener = new BuildJsonListener();
-  } else {
-    listener = new ReviverJsonListener(reviver);
+parse(String json, [reviver(var key, var value)]) {
+  if (reviver != null) {
+    var original = reviver;
+    reviver = (key, value) => original(key == null ? "" : key, value);

[floitsch, 2013/08/27 13:25:40]

Again: let's make this in a separate CL.

[Lasse Reichstein Nielsen, 2013/08/28 08:02:59]

Done.

   }
-  new JsonParser(json, listener).parse();
-  return listener.result;
+  return JSON.decode(json, reviver: reviver);
 }
 
 /**