Mojo JS Bindings: fix the demos

mojo/public/js/connector.js

 // Copyright 2014 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.
 
 define("mojo/public/js/connector", [
   "mojo/public/js/buffer",
   "mojo/public/js/codec",
   "mojo/public/js/core",
   "mojo/public/js/support",
 ], function(buffer, codec, core, support) {
 
   function Connector(handle) {
     if (!core.isHandle(handle))
       throw new Error("Connector: not a handle " + handle);
     this.handle_ = handle;
     this.dropWrites_ = false;
     this.error_ = false;
     this.incomingReceiver_ = null;
     this.readWaitCookie_ = null;
     this.errorHandler_ = null;
 
-    this.waitToReadMore_();
+    if (handle)
+      this.waitToReadMore_();
   }
 
   Connector.prototype.close = function() {
     if (this.readWaitCookie_) {
       support.cancelWait(this.readWaitCookie_);
       this.readWaitCookie_ = null;
     }
     if (this.handle_ != null) {
       core.close(this.handle_);
       this.handle_ = null;
@@ skipping 89 matching lines @@
 
   TestConnector.prototype.deliverMessage = function() {
     this.readMore_(core.RESULT_OK);
   }
 
   var exports = {};
   exports.Connector = Connector;
   exports.TestConnector = TestConnector;
   return exports;
 });