Fix debug build when allocation timeout is disabled

See https://chromium-review.googlesource.com/c/v8/v8/+/869932

Bug: v8:6972
Change-Id: I012210a31265adb7f7038a9b447f24e2d40ebca7
Reviewed-on: https://chromium-review.googlesource.com/895762Reviewed-by: Franziska Hinkelmann <franzih@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Franziska Hinkelmann <franzih@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51022}

src/runtime/runtime-test.cc

@@ -617,10 +617,12 @@ RUNTIME_FUNCTION(Runtime_NotifyContextDisposed) {
 RUNTIME_FUNCTION(Runtime_SetAllocationTimeout) {
   SealHandleScope shs(isolate);
   DCHECK(args.length() == 2 || args.length() == 3);
-#ifdef DEBUG
-  CONVERT_INT32_ARG_CHECKED(interval, 0);
+#ifdef V8_ENABLE_ALLOCATION_TIMEOUT
   CONVERT_INT32_ARG_CHECKED(timeout, 1);
   isolate->heap()->set_allocation_timeout(timeout);
+#endif
+#ifdef DEBUG
+  CONVERT_INT32_ARG_CHECKED(interval, 0);
   FLAG_gc_interval = interval;
   if (args.length() == 3) {
     // Enable/disable inline allocation if requested.