Implemented cancel connect.

remoting/webapp/me2mom/xhr.js

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * @fileoverview
  * Simple utilities for making XHRs more pleasant.
  */
 
 'use strict';
@@ skipping 30 matching lines @@
  * @param {string} url The base URL to GET, excluding parameters.
  * @param {function(XMLHttpRequest):void} onDone The function to call on
  *     completion.
  * @param {(string|Object.<string>)} opt_parameters The request parameters,
  *     either as an associative array, or a string.  If it is a string, do
  *     not include the ? and be sure it is correctly URLEncoded.
  * @param {Object.<string>} opt_headers Additional headers to include on the
  *     request.
  * @param {boolean} opt_withCredentials Set the withCredentials flags in the
  *     XHR.
- * @return {void} Nothing.
+ * @return {XMLHttpRequest} The request object.
  */
 remoting.xhr.get = function(url, onDone, opt_parameters, opt_headers,
                             opt_withCredentials) {
   var xhr = new XMLHttpRequest();
   xhr.onreadystatechange = function() {
     if (xhr.readyState != 4) {
       return;
     }
     onDone(xhr);
   };
@@ skipping 25 matching lines @@
     // No problem here. Do nothing.
   } else {
     throw 'opt_headers must be associative array.';
   }
 
   if (opt_withCredentials) {
     xhr.withCredentials = true;
   }
 
   xhr.send(null);
+  return xhr;
 }
 
 /**
  * Execute an XHR POST asynchronously.
  *
  * @param {string} url The base URL to POST, excluding parameters.
  * @param {function(XMLHttpRequest):void} onDone The function to call on
  *     completion.
  * @param {(string|Object.<string>)} opt_parameters The request parameters,
  *     either as an associative array, or a string.  If it is a string, be
@@ skipping 41 matching lines @@
   }
 
   if (opt_withCredentials) {
     xhr.withCredentials = true;
   }
 
   xhr.send(postData);
 }
 
 }());