Fix mjsunit's assertOptimized and assertUnoptimized.

test/mjsunit/mjsunit.js

 // Copyright 2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 373 matching lines @@
   var OptimizationStatusImpl = undefined;
 
   var OptimizationStatus = function(fun, sync_opt) {
     if (OptimizationStatusImpl === undefined) {
       try {
         OptimizationStatusImpl = new Function(
             "fun", "sync", "return %GetOptimizationStatus(fun, sync);");
       } catch (e) {
         throw new Error("natives syntax not allowed");
       }
-    } else {
-      OptimizationStatusImpl(fun, sync_opt);
     }
+    return OptimizationStatusImpl(fun, sync_opt);
   }
 
   assertUnoptimized = function assertUnoptimized(fun, sync_opt, name_opt) {
     if (sync_opt === undefined) sync_opt = "";
     assertTrue(OptimizationStatus(fun, sync_opt) != 1, name_opt);
   }
 
   assertOptimized = function assertOptimized(fun, sync_opt, name_opt) {
     if (sync_opt === undefined) sync_opt = "";
     assertTrue(OptimizationStatus(fun, sync_opt) != 2, name_opt);
   }
 
 })();