Bug 1817015 - Convert JSM in browser/components/protocolhandler to ESM r=kpatenio

Differential Revision: https://phabricator.services.mozilla.com/D172829

browser/components/protocolhandler/WebProtocolHandlerRegistrar.sys.mjs

@@ -3,11 +3,9 @@
  * 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 = ["WebProtocolHandlerRegistrar"];
-
 const STRING_BUNDLE_URI = "chrome://browser/locale/feeds/subscribe.properties";
 
-function WebProtocolHandlerRegistrar() {}
+export function WebProtocolHandlerRegistrar() {}
 
 WebProtocolHandlerRegistrar.prototype = {
   get stringBundle() {

browser/components/protocolhandler/components.conf

@@ -8,7 +8,7 @@ Classes = [
     {
         'cid': '{efbd7b87-9b15-4684-abf0-dc2679daadb1}',
         'contract_ids': ['@mozilla.org/embeddor.implemented/web-protocol-handler-registrar;1'],
-        'jsm': 'resource:///modules/WebProtocolHandlerRegistrar.jsm',
+        'esModule': 'resource:///modules/WebProtocolHandlerRegistrar.sys.mjs',
         'constructor': 'WebProtocolHandlerRegistrar',
         'processes': ProcessSelector.MAIN_PROCESS_ONLY,
     },

browser/components/protocolhandler/moz.build

@@ -7,7 +7,7 @@
 BROWSER_CHROME_MANIFESTS += ["test/browser/browser.ini"]
 
 EXTRA_JS_MODULES += [
-    "WebProtocolHandlerRegistrar.jsm",
+    "WebProtocolHandlerRegistrar.sys.mjs",
 ]
 
 XPCOM_MANIFESTS += [