More tests updated to optimize code (Part 2).

tests/language/issue7525_test.dart

Index: tests/language/issue7525_test.dart
===================================================================
--- tests/language/issue7525_test.dart	(revision 24922)
+++ tests/language/issue7525_test.dart	(working copy)
@@ -1,6 +1,7 @@
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
+// VMOptions=--optimization-counter-threshold=10 --no-use-osr
 
 import "package:expect/expect.dart";
 
@@ -14,7 +15,7 @@
 }
 
 main() {
-  for (int i = 0; i < 5000; i++) {
+  for (int i = 0; i < 20; i++) {
     foo();
   }
   Expect.equals(2, foo());