Fix for undefined reject() in extension_view_api_methods.js.

extensions/renderer/resources/guest_view/extension_view/extension_view_api_methods.js

 // Copyright 2015 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.
 
 // This module implements the public-facing API functions for the
 // <extensionview> tag.
 
 var ExtensionViewInternal =
     require('extensionViewInternal').ExtensionViewInternal;
 var ExtensionViewImpl = require('extensionView').ExtensionViewImpl;
@@ skipping 14 matching lines @@
 
 ExtensionViewImpl.prototype.load = function(src) {
   return new Promise(function(resolve, reject) {
     this.loadQueue.push({src: src, resolve: resolve, reject: reject});
     this.loadNextSrc();
   }.bind(this))
   .then(function onLoadResolved() {
     this.pendingLoad = null;
     this.loadNextSrc();
   }.bind(this), function onLoadRejected() {
+    this.pendingLoad.reject('Failed to load.');
     this.pendingLoad = null;
     this.loadNextSrc();
-    reject('Failed to load.');
   }.bind(this));
 };
 
 // -----------------------------------------------------------------------------
 
 ExtensionViewImpl.getApiMethods = function() {
   return EXTENSION_VIEW_API_METHODS;
 };