update client to use channel rather than socket

pkg/analysis_server/lib/src/protocol.dart

 // Copyright (c) 2014, 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 protocol;
 
 import 'dart:convert' show JsonDecoder;
 
 /**
  * Instances of the class [Request] represent a request that was received.
@@ skipping 129 matching lines @@
   int toInt(Object value) {
     if (value is int) {
       return value;
     } else if (value is String) {
       return int.parse(value, onError: (String value) {
         throw new RequestFailure(new Response.expectedInteger(this, value));
       });
     }
     throw new RequestFailure(new Response.expectedInteger(this, value));
   }
+
+  /**
+   * Return a table representing the structure of the Json object that will be
+   * sent to the client to represent this response.
+   */
+  Map<String, Object> toJson() {
+    Map jsonObject = new Map();
+    jsonObject[ID] = id;
+    jsonObject[METHOD] = method;
+    params.forEach((String key, Object value) {
+      jsonObject[key] = value;
+    });
+    return jsonObject;
+  }
 }
 
 /**
  * Instances of the class [Response] represent a response to a request.
  */
 class Response {
   /**
    * The name of the JSON attribute containing the id of the request for which
    * this is a response.
    */
@@ skipping 333 matching lines @@
   /**
    * The response to be returned as a result of the failure.
    */
   final Response response;
 
   /**
    * Initialize a newly created exception to return the given reponse.
    */
   RequestFailure(this.response);
 }