Remove the unlocker from the JS thread in ProfMultipleThreads to

avoid getting a profiling sample while not holding the locker,
because we will not get a stack sample in that case.
Review URL: http://codereview.chromium.org/668063

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4024 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

test/cctest/test-log.cc

@@ -404,10 +404,7 @@ class LoopingJsThread : public LoopingThread {
             "var j; for (var i=0; i<10000; ++i) { j = Math.sin(i); }");
       }
       context.Dispose();
-      {
-        v8::Unlocker unlocker;
-        i::OS::Sleep(1);
-      }
+      i::OS::Sleep(1);
     }
   }
 };