Replace rest of defer usages using small shim. Add homebrew promise utils

src/utils/MultiInviter.js

@@ -24,6 +24,7 @@ import {_t} from "../languageHandler";
 import sdk from "../index";
 import Modal from "../Modal";
 import SettingsStore from "../settings/SettingsStore";
+import {defer} from "./promise";
 
 /**
  * Invites multiple addresses to a room or group, handling rate limiting from the server
@@ -71,7 +72,7 @@ export default class MultiInviter {
                 };
             }
         }
-        this.deferred = Promise.defer();
+        this.deferred = defer();
         this._inviteMore(0);
 
         return this.deferred.promise;

src/utils/promise.js

@@ -0,0 +1,46 @@
+/*
+Copyright 2019 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// @flow
+
+// Returns a promise which resolves with a given value after the given number of ms
+export const sleep = (ms: number, value: any): Promise => new Promise((resolve => { setTimeout(resolve, ms, value); }));
+
+// Returns a promise which resolves when the input promise resolves with its value
+// or when the timeout of ms is reached with the value of given timeoutValue
+export async function timeout(promise: Promise, timeoutValue: any, ms: number): Promise {
+    const timeoutPromise = new Promise((resolve) => {
+        const timeoutId = setTimeout(resolve, ms, timeoutValue);
+        promise.then(() => {
+            clearTimeout(timeoutId);
+        });
+    });
+
+    return Promise.race([promise, timeoutPromise]);
+}
+
+// Returns a Deferred
+export function defer(): {resolve: () => {}, reject: () => {}, promise: Promise} {
+    let resolve;
+    let reject;
+
+    const promise = new Promise((_resolve, _reject) => {
+        resolve = _resolve;
+        reject = _reject;
+    });
+
+    return {resolve, reject, promise};
+}