Support new-style Mojo JS core API on IOS.

ios/web/webui/resources/web_ui_module_load_notifier.js

-// Copyright 2016 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.
-
-goog.provide('__crWeb.webUIModuleLoadNotifier');
-
-/**
- * A holder class for require.js contexts whose load is pending.
- * @constructor
- */
-var WebUIModuleLoadNotifier = function() {
-  this.lastUsedId_ = 0;
-  this.pendingContexts_ = new Map();
-};
-
-/**
- * Adds the given context to the list of pending contexts.
- * @param {string} name Name of the module that will be loaded.
- * @param {!Object} context Require.js context to hold.
- * @return {string} Identifier for the added context, can be later used for
- *     {@code moduleLoadCompleted} and {@code moduleLoadFailed} arguments.
- */
-WebUIModuleLoadNotifier.prototype.addPendingContext = function(name, context) {
-  this.lastUsedId_++;
-  var key = name + this.lastUsedId_;
-  this.pendingContexts_.set(key, context);
-  return String(this.lastUsedId_);
-};
-
-/**
- * Signals that module has successfully loaded.
- * @param {string} name Name of the module that has been loaded.
- * @param {String} loadId Identifier returned from {@code addPendingContext}.
- */
-WebUIModuleLoadNotifier.prototype.moduleLoadCompleted = function(name, loadId) {
-  this.popContext_(name, loadId).completeLoad(name);
-};
-
-/**
- * Signals that module has failed to load.
- * @param {string} name Name of the module that has failed to load.
- * @param {String} loadId Identifier returned from {@code addPendingContext}.
- */
-WebUIModuleLoadNotifier.prototype.moduleLoadFailed = function(name, loadId) {
-  this.popContext_(name, loadId).onScriptFailure(name);
-};
-
-/**
- * Pops the pending context.
- * @param {string} name Name of the module that has failed to load.
- * @param {String} loadId Identifier returned from {@code addPendingContext}.
- * @return {Object} Require.js context
- */
-WebUIModuleLoadNotifier.prototype.popContext_ = function(name, loadId) {
-  var key = name + loadId;
-  var context = this.pendingContexts_.get(key);
-  this.pendingContexts_.delete(key);
-  return context;
-};