Bug 1624705 - Let Xray waiver nuking for local window proxies ride the trains. r=kmag

This has been on Nightly for almost a year and I don't think we've
seen any breakage, so I think it is time to let it ride the trains.

Differential Revision: https://phabricator.services.mozilla.com/D104555

Author: amccreight

dom/base/nsGlobalWindowOuter.cpp

@@ -2296,11 +2296,7 @@ nsresult nsGlobalWindowOuter::SetNewDocument(Document* aDocument,
                                JS::PrivateValue(nullptr));
       js::SetProxyReservedSlot(obj, HOLDER_WEAKMAP_SLOT, JS::UndefinedValue());
 
-#ifdef NIGHTLY_BUILD
       outerObject = xpc::TransplantObjectNukingXrayWaiver(cx, obj, outerObject);
-#else
-      outerObject = xpc::TransplantObject(cx, obj, outerObject);
-#endif
 
       if (!outerObject) {
         mBrowsingContext->ClearWindowProxy();

js/xpconnect/tests/chrome/test_bug773962.xhtml

@@ -60,13 +60,7 @@ https://bugzilla.mozilla.org/show_bug.cgi?id=773962
     ok(true, "Didn't crash!");
 
     // Now, make sure everything is set up how we expect.
-    const {AppConstants} = SpecialPowers.Cu.import("resource://gre/modules/AppConstants.jsm", {});
-    if (AppConstants.NIGHTLY_BUILD) {
-      ok(Cu.isDeadWrapper(win1Waiver), "window waiver should go away after navigation");
-    } else {
-      ok(win1Waiver === win1.wrappedJSObject, "waivers still work");
-      ok(XPCNativeWrapper(win1Waiver) === win1, "waivers still work");
-    }
+    ok(Cu.isDeadWrapper(win1Waiver), "window waiver should go away after navigation");
     ok(node1Waiver === node1.wrappedJSObject, "waivers still work");
     ok(XPCNativeWrapper(node1Waiver) === node1, "waivers still work");