Bug 1821158 - Convert browser/actors/RFPHelper* JSMs to ESMs updated r=kpatenio

Differential Revision: https://phabricator.services.mozilla.com/D172899

browser/actors/RFPHelperChild.sys.mjs

@@ -3,11 +3,7 @@
  * 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/. */
 
-var EXPORTED_SYMBOLS = ["RFPHelperChild"];
-
-const { XPCOMUtils } = ChromeUtils.importESModule(
-  "resource://gre/modules/XPCOMUtils.sys.mjs"
-);
+import { XPCOMUtils } from "resource://gre/modules/XPCOMUtils.sys.mjs";
 
 const kPrefLetterboxing = "privacy.resistFingerprinting.letterboxing";
 
@@ -20,7 +16,7 @@ XPCOMUtils.defineLazyPreferenceGetter(
   false
 );
 
-class RFPHelperChild extends JSWindowActorChild {
+export class RFPHelperChild extends JSWindowActorChild {
   handleEvent(event) {
     if (lazy.isLetterboxingEnabled && event.type == "resize") {
       this.sendAsyncMessage("Letterboxing:ContentSizeUpdated");

browser/actors/RFPHelperParent.sys.mjs

@@ -3,11 +3,8 @@
  * 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/. */
 
-var EXPORTED_SYMBOLS = ["RFPHelperParent"];
+import { XPCOMUtils } from "resource://gre/modules/XPCOMUtils.sys.mjs";
 
-const { XPCOMUtils } = ChromeUtils.importESModule(
-  "resource://gre/modules/XPCOMUtils.sys.mjs"
-);
 const lazy = {};
 ChromeUtils.defineModuleGetter(
   lazy,
@@ -24,7 +21,7 @@ XPCOMUtils.defineLazyPreferenceGetter(
   false
 );
 
-class RFPHelperParent extends JSWindowActorParent {
+export class RFPHelperParent extends JSWindowActorParent {
   receiveMessage(aMessage) {
     if (
       lazy.isLetterboxingEnabled &&

browser/actors/moz.build

@@ -77,8 +77,8 @@ FINAL_TARGET_FILES.actors += [
     "PromptParent.sys.mjs",
     "RefreshBlockerChild.jsm",
     "RefreshBlockerParent.jsm",
-    "RFPHelperChild.jsm",
-    "RFPHelperParent.jsm",
+    "RFPHelperChild.sys.mjs",
+    "RFPHelperParent.sys.mjs",
     "ScreenshotsComponentChild.sys.mjs",
     "SearchSERPTelemetryChild.sys.mjs",
     "SearchSERPTelemetryParent.sys.mjs",

toolkit/components/resistfingerprinting/RFPHelper.jsm

@@ -312,10 +312,10 @@ class _RFPHelper {
   _registerActor() {
     ChromeUtils.registerWindowActor("RFPHelper", {
       parent: {
-        moduleURI: "resource:///actors/RFPHelperParent.jsm",
+        esModuleURI: "resource:///actors/RFPHelperParent.sys.mjs",
       },
       child: {
-        moduleURI: "resource:///actors/RFPHelperChild.jsm",
+        esModuleURI: "resource:///actors/RFPHelperChild.sys.mjs",
         events: {
           resize: {},
         },