Use the Mojo StubBindings interface correctly in WebUSB LayoutTests.

mojo/public/js/bindings.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/bindings", [
   "mojo/public/js/router",
   "mojo/public/js/core",
 ], function(router, core) {
 
   var Router = router.Router;
@@ skipping 13 matching lines @@
   }
 
   // TODO(hansmuller): remove then after 'Client=' has been removed from Mojom.
   ProxyProperties.prototype.setLocalDelegate = function(impl) {
     if (this.local)
       StubBindings(this.local).delegate = impl;
     else
       throw new Error("no stub object");
   }
 
-  function connectionHandle(connection) {
-    return connection &&
-        connection.router &&
-        connection.router.connector_ &&
-        connection.router.connector_.handle_;
-  }
-
   ProxyProperties.prototype.close = function() {
-    var handle = connectionHandle(this.connection);
-    if (handle)
-      core.close(handle);
+    this.connection.close();
   }
 
   // Public stub class properties that are managed at runtime by the JS
   // bindings. See StubBindings below.
   function StubProperties(delegate) {
     this.delegate = delegate;
   }
 
   StubProperties.prototype.close = function() {
-    var handle = connectionHandle(this.connection);
-    if (handle)
-      core.close(handle);
+    this.connection.close();
   }
 
   // The base class for generated proxy classes.
   function ProxyBase(receiver) {
     this[kProxyProperties] = new ProxyProperties(receiver);
 
     // TODO(hansmuller): Temporary, for Chrome backwards compatibility.
     if (receiver instanceof Router)
       this.receiver_ = receiver;
   }
@@ skipping 51 matching lines @@
   }
 
   var exports = {};
   exports.EmptyProxy = ProxyBase;
   exports.EmptyStub = StubBase;
   exports.ProxyBase = ProxyBase;
   exports.ProxyBindings = ProxyBindings;
   exports.StubBase = StubBase;
   exports.StubBindings = StubBindings;
   return exports;
-});
+});