Update Chromoting to use /third_party/closure_compiler.

remoting/webapp/crd/js/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 170 matching lines @@
   }
 
   if (opt_withCredentials) {
     xhr.withCredentials = true;
   }
 
   xhr.send(useBody ? parameterString : null);
   return xhr;
 };
 
-/** Generic success/failure response proxy.
+/**
+ * Generic success/failure response proxy.
  *
  * @param {function():void} onDone
  * @param {function(remoting.Error):void} onError
  * @return {function(XMLHttpRequest):void}
  */
 remoting.xhr.defaultResponse = function(onDone, onError) {
   /** @param {XMLHttpRequest} xhr */
-  return function(xhr) {
+  var result = function(xhr) {
     /** @type {remoting.Error} */
-    var error = remoting.Error.fromHttpError(xhr.status)
+    var error = remoting.Error.fromHttpError(/** @type {number} */ (xhr.status))
     if (error == remoting.Error.NONE) {
       onDone();
     } else {
       onError(error);
     }
   };
+  return result;
 };