Reduce the number of iterations in some OSR tests by using an explicit %OptimizeOsr().

test/mjsunit/compiler/osr-simple.js

 // Copyright 2010 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Flags: --use-osr
+// Flags: --allow-natives-syntax --use-osr
 
 function f() {
   var sum = 0;
-  for (var i = 0; i < 1000000; i++) {
+  for (var i = 0; i < 1000; i++) {
     var x = i + 2;
     var y = x + 5;
     var z = y + 3;
     sum += z;
+    if (i == 11) %OptimizeOsr();
   }
   return sum;
 }
 
 
 for (var i = 0; i < 2; i++) {
-  assertEquals(500009500000, f());
+  assertEquals(509500, f());
 }