Improve apps v2 upgrade UX

remoting/webapp/js_proto/dom_proto.js

 // Copyright (c) 2012 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 file contains various hacks needed to inform JSCompiler of various
 // WebKit- and Chrome-specific properties and methods. It is used only with
 // JSCompiler to verify the type-correctness of our code.
 
 /** @type {HTMLElement} */
 Document.prototype.activeElement;
@@ skipping 201 matching lines @@
 /**
  * @param {function(*) : void} onReject
  * @return {Promise}
  */
 Promise.prototype['catch'] = function (onReject) {};
 
 /**
  * @param {Array.<Promise>} promises
  * @return {Promise}
  */
-Promise.prototype.race = function (promises) {}
+Promise.race = function (promises) {}
 
 /**
  * @param {Array.<Promise>} promises
  * @return {Promise}
  */
-Promise.prototype.all = function (promises) {};
+Promise.all = function (promises) {};
 
 /**
  * @param {*=} reason
  * @return {Promise}
  */
 Promise.reject = function (reason) {};
 
 /**
  * @param {*=} value
  * @return {Promise}
@@ skipping 42 matching lines @@
  * @param {number} begin
  * @param {number=} end
  * @return {ArrayBuffer}
  */
 ArrayBuffer.prototype.slice = function(begin, end) {};
 
 /**
  * @return {string}
  */
 Date.prototype.toISOString = function() {};