Move json to lib/json/{json.dart, json_frog.dart}

samples/chat/chat_stress_client.dart

 // Copyright (c) 2011, 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("chat_stress_client.dart");
 #import("http.dart");
-#import("../../client/json/dart_json.dart");
+#import("../../lib/json/json.dart");
 
 
 class ChatStressClient {
   ChatStressClient() : verbose = false, messagesToSend = 100;
 
   void run() {
     HTTPClient httpClient;  // HTTP client connection factory.
     String sessionId;  // Session id when connected.
     int sendMessageCount;  // Number of messages sent.
     int messageCount;
@@ skipping 149 matching lines @@
 
   int messagesToSend;
   bool verbose;
 }
 
 
 void main () {
   ChatStressClient stresser = new ChatStressClient();
   stresser.run();
 }