Revert "Fresh try at "Use browsers JSON.parse for parsing 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 3d2d615b5265fa9ea2ea3f505e2bcc8748687de7..4348767eea666865b422cd6e22b80c4042b1f1bc 100644
--- a/sdk/lib/json/json.dart
+++ b/sdk/lib/json/json.dart
@@ -35,24 +35,21 @@ class JsonUnsupportedObjectError implements Error {
 
 
 /**
- * Parses [json] and builds the corresponding parsed JSON value.
+ * Parses [json] and build the corresponding parsed JSON value.
  *
  * Parsed JSON values are of the types [num], [String], [bool], [Null],
  * [List]s of parsed JSON values or [Map]s from [String] to parsed
  * JSON values.
  *
- * The optional [reviver] function, if provided, is called once for each object
- * or list property parsed. The arguments are the property name ([String]) or
- * list index ([int]), and the value is the parsed value.  The return value of
- * the reviver will be used as the value of that property instead of the parsed
- * value.  The top level value is passed to the reviver with the empty string as
- * a key.
+ * The optional [revivier] function, if provided, is called once for each
+ * object or list property parsed. The arguments are the property name
+ * ([String]) or list index ([int]), and the value is the parsed value.
+ * The return value of the revivier will be used as the value of that property
+ * instead the parsed value.
  *
  * 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)]) {
+parse(String json, [reviver(var key, var value)]) {
   BuildJsonListener listener;
   if (reviver == null) {
     listener = new BuildJsonListener();