Revert "Bug 1996449 - Ensure runOncePerModification("displayMenuBar", ..) works as expected. r=mkaply,mossop" for causing bc failures @browser_policy_display_menu.js.

This reverts commit 0df9ebb.

Author: agoloman

browser/components/enterprisepolicies/Policies.sys.mjs

@@ -3177,8 +3177,6 @@ export function runOnce(actionName, callback) {
  *        A promise that will resolve once the callback finishes running.
  */
 async function runOncePerModification(actionName, policyValue, callback) {
-  // Stringify the value so that it matches what we'd get from getStringPref.
-  policyValue = policyValue + "";
   let prefName = `browser.policies.runOncePerModification.${actionName}`;
   let oldPolicyValue = Services.prefs.getStringPref(prefName, undefined);
   if (policyValue === oldPolicyValue) {

browser/components/enterprisepolicies/tests/browser/browser_policy_display_menu.js

@@ -28,22 +28,11 @@ add_task(async function test_menu_shown_string() {
 
   // Since testing will apply the policy after the browser has already started,
   // we will need to open a new window to actually see the menu bar
-  {
-    let newWin = await BrowserTestUtils.openNewBrowserWindow();
-    let menubar = newWin.document.getElementById("toolbar-menubar");
-    ok(!menubar.hasAttribute("autohide"), "The menu bar should not be hidden");
-    setToolbarVisibility(menubar, false);
-    ok(menubar.hasAttribute("autohide"), "The menu bar should be hidden");
-    await BrowserTestUtils.closeWindow(newWin);
-  }
+  let newWin = await BrowserTestUtils.openNewBrowserWindow();
+  let menubar = newWin.document.getElementById("toolbar-menubar");
+  ok(!menubar.hasAttribute("autohide"), "The menu bar should not be hidden");
 
-  {
-    // Make sure the menubar autohide persists even tho it's default-on.
-    let newWin = await BrowserTestUtils.openNewBrowserWindow();
-    let menubar = newWin.document.getElementById("toolbar-menubar");
-    ok(menubar.hasAttribute("autohide"), "The menu bar should be hidden");
-    await BrowserTestUtils.closeWindow(newWin);
-  }
+  await BrowserTestUtils.closeWindow(newWin);
 });
 
 add_task(async function test_menubar_on() {