Bug 1817016 - Convert JSM in browser/components/prompts to ESM. r=kpatenio

Differential Revision: https://phabricator.services.mozilla.com/D173078

browser/components/prompts/PromptCollection.sys.mjs

@@ -2,19 +2,13 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-"use strict";
-
-var EXPORTED_SYMBOLS = ["PromptCollection"];
-
-const { XPCOMUtils } = ChromeUtils.importESModule(
-  "resource://gre/modules/XPCOMUtils.sys.mjs"
-);
+import { XPCOMUtils } from "resource://gre/modules/XPCOMUtils.sys.mjs";
 
 /**
  * Implements nsIPromptCollection
  * @class PromptCollection
  */
-class PromptCollection {
+export class PromptCollection {
   confirmRepost(browsingContext) {
     let brandName;
     try {

browser/components/prompts/components.conf

@@ -6,7 +6,7 @@ Classes = [
     {
         'cid': '{7913837c-9623-11ea-bb37-0242ac130002}',
         'contract_ids': ['@mozilla.org/embedcomp/prompt-collection;1'],
-        'jsm': 'resource:///modules/PromptCollection.jsm',
+        'esModule': 'resource:///modules/PromptCollection.sys.mjs',
         'constructor': 'PromptCollection',
     },
 ]

browser/components/prompts/moz.build

@@ -6,7 +6,7 @@ with Files("**"):
     BUG_COMPONENT = ("Toolkit", "Notifications and Alerts")
 
 EXTRA_JS_MODULES += [
-    "PromptCollection.jsm",
+    "PromptCollection.sys.mjs",
 ]
 
 XPCOM_MANIFESTS += [